Weak spark causes. Motor will not start.
Weak spark causes think it might be a carb problem. I have a 94 Vulcan 500 with 17000 miles. I checked the spark,seemed to me a weak,small, orange spark,so put in the stock coil,same thing,so I took off the corrective cap,and the accel ignition module,and put in the stock parts. 9 ohm green or black to spark cap 3. I"ve checked the voltage to the coil and it"s fine, ( 13v) I need to check the Ohms at the coil. Edit. You might get one quick spark when it first starts cranking and then not see it again until you try again later. This might seem silly and really elementary, but seemingly big problems are sometimes caused by the simplest failures. It was real hard to start and wouldn't idle so I started checking fuel and spark. im gettin weak spark on the positive side of coil. It was not until I got my very strong magnifying eye 6. Changed plugs, battery is good. BushogPapa Well-known Member. 1 A failed coil pack. When spark plugs get wet, it could cause the spark to “ground out,” inhibiting the ignition of the fuel. Sled won’t shut off condition: I have seen a few things cause this. In simpler terms, when a spark plug is wet, the spark does not arc correctly across the gap between the electrodes. A weak spark can simulate a rich air-fuel mixture where not all fuel ignites. live side. It was running fine then put it away before I could test drive it cause of the warming. Faulting condenser will also cause a weak spark. The symptoms you have are typical of a failed coil. Stupid question: Is this spark too weak? I have to assume so WICO EK, Hercules 2HP. also in run position tryin to start with out hotwire i loose all spark,then it comes back when i Yes, a weak battery often causes yellow spark while trying to crank. A fouled plug can lead to a weak spark, as can low primary voltage, a slow primary feed voltage compared to the bikes timing. Weak sparks cause trouble starting, as well as running, especially because there’s not enough heat generated with the spark to accomplish a reliable ignition of the air/fuel mixture in the combustion chamber. Malfunctioning Coil. Pull out the ignition coil and cdi of my friend klx and installed on my klx - still very very very weak spark. Ignition coils can also fail due to age. the mag would give a very weak blue spark which was intermittent. weak spark. mike2012 Discussion starter. This is one of the ways on how to fix weak spark in snowmobile easily when it occurs. The bike runs perfect 99% of the time but for some reason it will just randomly cut out and run on only one cylinder then will pick up and run on both. I heard the motor tone change to normal and then the I could see a good strong spark on the tester. Joined May 6, 2010 Threads 44 A weak spark can prevent your lawn mower from starting, and if it does start, it can There are several reasons why a lawn mower can experience a weak spark. Get to the point(s)! Once it is determined that the magneto has low or no output, the next step is the most likely cause pf failure and that is dirty points. Banned; 775 Gender: Male; Interests: welding, riding. Ended up replacing plugs, leads, condensor, and points. Back to Basics Continues. Maybe one for every 15 revolutions. 2. In worse cases, the spark plug will produce no spark. Most small engines run well with a gap of . this can be caused by a weak battery check battery and charging system to verify a good working system. Timing looks good. #6: Ignition coil Identifying Bad Spark Plug Symptoms. Can a bad coil cause weak spark? Of course, a faulty ignition coil will have a bad influence on the engine’s performance. 3K views 13 replies 5 participants last post by Air Duck Jul 4, 2015. Jump to Latest 10K views 8 replies 5 participants last post by NYUK Sep 28, 2004. Besides cold start problems, faulty spark plugs can also cause: Reduced Engine Performance: Weak or intermittent sparks can lead to power loss and hesitation. Thread starter OldGuy; Start date Jul 9, 2010; O. 4 KB · Views: 12 ILENGINE Lawn Royalty. Re: Causes of weak spark on Tohatsu 18HP 2-stroke? In my tired stuper last night my searching abilities were not quite all there. 003-. When it stalls it has weak to no spark. 4 That would cause the coil to break down and loose spark. Or sooty from a partial burn under a weak spark condition. While in the crank/no start mode you replaced most of your ignition, including three coils, and still have the crank/no start/weak spark. I checked the usual things and they were fine. Thanks. Most weak spark issues start with a weaking CDI. Usually no spark. Bad Voltage regulator can affect the ignition and cause a no spark condition I have weak spark on both cylinders with brand new plugs so I'm certain it's a spark issue. I’d say the swap means grounds should be suspect. This can happen if the plug becomes wet or dirty, or if it is improperly gapped. If it’s old or producing a weak spark, consider replacing it. still hard to start have to check everything else. Yesterday, it didn't want to start. A damaged power transistor will cause a loss of secondary voltage capability or energy transferred to the plug (ie: a weak spark). if spark is weak at the plugs it could be a bad cap/rotor, ignition wires Weak spark issues like missing under load or at high speed are a bit more complicated and will be addressed later. During your diagnostic process, it’s important to eliminate the simple factors that could cause your problem. J. If it doesn't do that or doesn't do that well you get a weak/no spark. To correct this, you have to change the ignition coil to a good one. Need a bit of a sanity check here guys n gals Apart from the coils, HT leads, or spark plugs, is there anything else that can This could be the cause of the spark issue. Ken B. If only one spark plug is dead, the problem has to be closer to the plug. Identifying weak spark symptoms can help you A CDI box can indeed cause weak spark due to various internal failures, such as insufficient capacitor charge, trigger coil malfunctions, or electrical interference. sonny12 Discussion starter. Then replaced ignition relay same same. Causes of a Lean Condition. Causes: Plugs too cold for the engine or too hot for the operating conditions. If left unchecked, a misfiring engine can cause damage to the catalytic converter and other engine components. Grounds, coil, wires to and from coil. If you notice condensation inside the distributor cap You didn’t mention replacing the ignition wires, which can also cause a weak spark if the internal resistance is high, but that’s not common. Ignition system issues can typically be traced back to a few key If you are getting weak spark out of only 1 side of the coil then it's most likely a bad plug wire. I have to spin it pretty fast with drill to get a weak spark and no spark when I pull by hand. new plugs and a correctly set very weak spark. The coil test is the best place to start. Weak Spark – things to check first this is for any of you that have anemic spark and are having hard starts. Today BGW. A lean condition of the spark plug can be caused by a variety of factors. not resistor wires. After my experience i always suggest to 2. I have checked all connections, grounds and wires all seem intact and good. Air is a little more complicated because it involves the It sounds like you may be using the ballast wire because that would cause low voltage. until you confirm that the battery is good, a weak battery is a likely cause of a weak spark. started to sort the bike out eventually. Increased Emissions: Incomplete combustion due to weak sparks can result in higher If you have corrosion around the pick up coil or if the rotor or cap is corroded or burned it can cause a weak spark like this here. He said he has a very weak spark. Ed from Just Brits seems to think I have a weak ground to the coil. For example, once I saw the weak spark on a known good spark plug, I could’ve just called it a cap and rotor, but Yes, a weak battery can cause a no spark issue, as it may not have enough power to supply the ignition system, resulting in a no spark condition. - resistance reading is within the Customer: i have a 1999 yamaha 250 ox 66 saltwater series L250TXRX. Worn distributor shafts cause fewer problems for electronic ignitions starts but weak spark. When there is no to little spark in a snowmobile, it might look like a very big problem to a lot of people. Spark looks the same off of the wire to the case. Im pulling my hair out, I cant get my car to start, winds over fine has fuel, checked the timing a hundred times but seems to have a weak spark. Does the plug have spark, test the plug with a spark plug tester. By the way, this is a major problem with older bikes that idle rough , even after multiple attempts at cleaning and adjusting the carbs. i like a hot plug like an al437. Of course, this problem can cause your engine to ignite but not spark enough to continue to start. Only thing I can think is the spark is too weak, or it's not sparking at the right time. Jump to Latest 4. Trust us on this one. I looked again this morning and found a post where pvanv gave the following info: " And the ignition coil (362060500 is superceded to 3M3060481M) is also available: 3M3060481M IGNITION COIL W/RESISTANCE $43. 3067 posts · Joined 2013 Add to quote; Only show this user #1 · Jul 3, 2015. 5%, ~120 psi (1st crank) . A service manual can help you determine if each component is within the manufacturer’s range, and if it isn’t it should be replaced with a new component. One plug gaped too wide will cause both not to fire or fire intermittently. if the plugs are wet. Are ignition condensers interchangeable? Any condenser of the same value will work. Problem: The spark module is the part that causes ignition to happen by generating a spark, and must be replaced if it fails. So I am wondering if a weak spark is actually a thing and if so, what the symptoms of that would be. Busflyer Member. This can occur due to worn-out spark plugs, damaged ignition The bad ground cable will cause a weak spark because of the coil getting less power but you will not feel this because if the ground is bad, your starter motor will not crank the engine. How a trimmer ignition system works. 68K ohm Pulse Gen: 309 ohm Exciter Coil: 174 ohm Even the timing chain can jump a tooth and cause a problem like this. Diagnosing no spark, weak spark or intermittent spark issues Also, bad reeds on a sled will cause it to back fire and run poorly acting like it is an electrical issue. 75k ohms. The bike is hard too start. S. The 9v supply to the HEI module could surely cause fouled spark plugs and degrade the HEI module to the point of complete failure. Dec 1, 2020 / Briggs Ignition - Weak Spark People call an orange spark a ‘Weak Spark. Weak Spark. Spark that is too weak can fail to cross the gap at the spark plug for two main reasons. To avoid this, it is important to understand what can cause a weak spark in an outboard motor. we checked the new coil got same readings as old, has weak spark then no spark kick it a couple of times haves spark a couple more kicks it has no spark Test coil primary resistance 0. Are any ignition parts from an 05-13 interchangeable with the 02-04 models? I can find 05-13 Cdi and coil and wiring for same price os 02-04 parts so I would like to use newer used parts if it will work. What causes this? Should I replace the coil or stator or Cdi unit? Not sure how to tell which os bad. A magnet (located on the flywheel), an ignition coil, and a spark plug. He has changed the coil and all of the ignition pieces. Fuel Tank, no air leaks from the tank to the pump. I have now replaced the cdi with a known good one I have borrowed but I now have no spark at all. willardwright59. REMEMBER, 'Free' internet information is worth EXACTLY what you paid for it! LINK:BASIC WIRING 101. The irregular or Spark problem. I'm getting a weak spark to my plugs in my pick-up. A banshee freak comes over and does a full ignition system diagnosis on it and decides it must have a bad connection somewhere as all the components test ok. couldnt get a spark and using the ohms meter couldnt single out why so i thought sod it Very weak spark. Motor will not start. Try to start it, it won't start. it's a real PITA-- sometimes you'll cause even more problems. Spark from ground to the coils wire was strong Was jumping even more than an 1/8 inch. Fix: Simply replace the camshaft position sensor, typically located under the distributor rotor cap. The most common is a problem with the ignition system. https://amzn. very weak spark on one bank of plugs,one of the charge coils on the stator had a ohm reading 160 the other 300. B. One possibility is that the spark plug is fouled or damaged. First off it Hey fella's i have a 1996 thundercat and i recently had to rebuild the whole upper end only cause the left cylinder went out on me well my question is the coil that runs 2 cylinders is very weak almost no spark at all especially the far left one i think that might be the reason she blew up well anyway could that cause the problem cause it is kinda of hard to start and it takes A weak ignition coil is one of the most common causes of a misfiring engine. Any ideas? B. It can lead to poor fuel economy, decreased power, and even engine misfires. In your case, if you feel you have a weak spark, I would replace the coil, but remember that coils are electrical parts and 99% of the time they cannot be returned. 651. If it’s an N, if the distributor is on the front or side of the C1 & C2 Corvettes - Weak spark causes - I recently purchased a 1964 coupe that had been stored for 5 or 6 years without much use. The ignition coil was bad so I replaced ignition coil, installed new pulse coil. If none has spark, the whole ignition system is not getting power. With the spark plug removed I can only get a weak spark when the starter button is first pressed or after I have released it, there is nothing whilst it is cranking. First, fuel pressure may be too low, causing a lack of fuel in the cylinders. If you have a weak spark, you are either not getting full voltage to the coil, the coil isn't grounded properly, or you have resistance between the coil and the spark plugs, such as an open wire. This can be caused by several things, including a bad coil, distributor cap, or rotor. The coil does not need to be grounded, at least not on the case. The current then runs through the primary side of the coil. Pull the rotor off, and look for cracks in the magnet around the dizzy shaft. If an engine’s spark plugs are not providing a strong enough spark, it cannot efficiently burn the fuel, and the vehicle will experience decreased fuel efficiency. i have weak spark i did an oms test on the stator and it was ok also i pulled the flywheel off with a three arm puller and i think i bent NOTE: If your bike has more than one cylinder, it may still fire if only one cylinder has no spark. OldGuy XS650 Member. Bad coils, weak condenser, bad internal wires, corrosion on wire connectors/contacts, damaged points, or weak magnet charge can all be a cause. What causes weak spark. I had been expecting a good fat spark, but was disappointed. What Causes Weak Spark??? Jump to Latest 24K views 52 replies 10 participants last post by sonny12 Apr 9, 2009. the spark is blue but looks on the weak side. Is that right? The Just a weak spark is all I get. This will help deliver the needed amount of charge to the spark plug. Jump to Latest 24K views 1 reply 2 participants last post by bill z Apr 13, 2012. Bruce (VA) Well-known Member. In MHO it should read above 16 or Check the coil for proper power 12v and ground. came back down to idle and problem was back. You checked your stator and your coil and all was in spec,,but you said Is There Spark at the Plugs? When looking for troubles, it’s usually best to start at the spark plug-end of the ignition path and work backward. When you turn the engine (pull the cord), the flywheel rotates. I put an in line spark tester on it and it appeared to have a very weak spark. cant jump more then 1/2 in. The only thing I can think of and I’m going to hopefully check this today; can a loose timing chain cause this issue with the weak spark? The spark seems somewhat weak. I will check all these and get back to you. In certain instances, the engine will start but immediately shut down. Engage the bendix 4. " This is likely a misinterpretation. If both are weak it's the coil. They are indifferent to voltage but the capacitance (microfarads) should 8N weak or no spark. A weak spark can have many causes. Any idea what might cause it to produce some spark but not enough to start? The opening and closing of the points is the interruption in that path that causes the spark. Jul 9, 2010 #1 OK fellows I posted a thread on here awhile ago about a 1979 XS650 pouring gas out the one carb. Voltage drop from battery is only 1/10 volt at points. 7. Have replaced everything with new, coil, plugs, plug leads, reco dizzy, points gap seems fine. 198 posts · Joined 2011 Add to quote; Only show this user #1 · Sep 10, 2011. spark plug wires should be metalic core. The plugs in a wasted spark ignition system are wired in series. 4. You may notice issues such as misfiring, where the spark plugs fail to ignite the fuel properly, or difficulty starting the engine. Fix: Test the coil using a spark light tester to ensure it’s producing a strong spark. Reactions: Scrubcadet10. Checked ohms on the stator (within specs), the crank sensor (within specs), and the coil (within specs). no start. have gone thru all the usal suspects. A couple of items can cause weak/erratic spark on a Tecumseh (or Briggs & Stratton) engine. After running it for a while, I've confirmed that the I'm also wondering if a bad battery is the likely/only cause for having a weak spark across all my spark plugs( some slightly weaker than others). After several tries, it did start but was running in the "bogged down" state. Check the spark, no spark. Over time, this will cause the plug to carbon foul. Worn spark plugs will cause the fuel economy to go down because your engine won’t burn all fuel Make sure the engine has the correct spark plugs and they’re gapped correctly. Fuel is self explanatory, no fuel or a lack of fuel causes misfire. ) Weak Spark. Here are the parts that I very weak spark. One is simple lack of voltage to jump the gap, and the other is because the electric charge is shunted across the insulator of the plug by some conductive deposit such as oil or metallic residue from engine oil or fuel additives. If the key is even slightly sheared, it can cause weak/erratic spark. Hard starts and a poorly running engine can also be clues that your stator needs to be rebuilt or another thing to do is pull the spark plugs and check their condition. Yesterday, I got all my side jobs done and finally had time to work on my car. The caps seem to vary in resistance from ~10. if they are more than a couple years old. comments and input please,as I have had week spark cause rich conditions before,after this accel parts I will not buy,in the 80s they were good,guess that My 14 year old pushmower had a weak spark due to rust build up on both the armature and magneto. Thread starter Hunter cruise; Start date Nov 20, 2021; Tags carb advice electrical no spark rebuild Yamaha Blaster Parts & Support. Got an ms441 on the bench. The only things causing a weak or no spark would be the coil itself, or a bad pertronix unit. I could get the bike to backfire, but that was all. The ignition is a HEI ignition and has the coil mounted in the distributor and also a vacuum advance distributor. 9K views 2 replies 2 participants last post by customryder Nov 1, 2004. It's an old electrical system, and one thing slightly messed up will cause the whole thing to not work right. When an ignition coil starts to weaken, it can no longer generate enough voltage to spark the fuel mixture in the engine’s cylinders consistently. The low voltage doesn't count for much when the engine is spun up, but causes a miss at idle speed. Inspect the spark plugs regularly for any signs of wear or damage. you don`t say if its weak coming out of the coil or at the plugs. I narrowed it down to the spark plugs. They would only spark when you let Re: Cause of weak spark Reply #8 on: February 24, 2013, 09:23:50 pm checked the valves, they were tight so I adjusted them. Weak spark or misfiring can result in unburned fuel accumulating on the spark plugs. 1K views 10 replies 3 participants last post by mike2012 Sep 23, 2011. Carburetors, not buying it. A poor ground from the distributor path to battery may limit spark intensity but I Many things can cause or contribute to a weak spark. 007 A business card is very good for setting the proper gap. The general consensus was to re-build the carbs. With the engine idling, the spark looks very weak, like the spark you get on a weedwacker or chainsaw. Primer l Spark plug gap is very important. But this would have no effect on your plugs because the heat generated under a lean burn situation would not be generated so your plugs could look wet. I pulled the brandy new plug, and jumpered it. I pulled boot off wire and checked spark from wire. Nov 20, 2021 #1 Ok so i finished rebuilding my blaster after destroying the top end( new top end is ported and polished weak spark troubleshooting. After identifying the signs of a weak spark, it’s crucial to understand the potential causes. Weak spark may cause starting and running difficulties as there may not be enough heat generated in the spark to accomplish ignition of the fuel/air mix in the combustion chamber. check the rectifier/regulator based on resistance reading method stated on KLX service manual. A weak spark is an indication that something’s not quite right. "It appears to be a weak spark and doesn't seem to be 100% consistent. But your problem sounds a lot like the problem they had with the CDI on some of the early '90s models. cause theres that little ground wire that mounts on the mounting bolt. The most common reasons boats struggle with a weak spark turn out to be Ed, Interesting problem: Points, condenser, or the coil do not know if cylinders 1 and 4 or 2 or 3 are firing and unlikely to cause the problem . The inside looked very clean. The ignition system is made up of 3 major parts. Engine Misfiring And Stalling Very weak spark. Attachments. Ignition System Issues. Re-check your coil-to-flywheel gap. If your car starts, but there’s no engine power, spark, or any kind of movement, a damaged ignition coil could be the cause of this problem. Top Poster Of Month. It is very weak there also. Due to this, the spark plug will also produce a weak spark. 1987 Johnson 70 hp. 2 An injector that is leaking down. customryder Discussion starter. searcychris07 Discussion starter. A plug gap too large or too small can change the overall weakness or strength of a spark. 7 11-10-03 04:50 AM - Post# 333455 In response to builderpaul your coil is shot,i have seen this more than twenty times this year alone,these new systems with an external coil have a problem with coil going dead resulting in a faint or weak spark,it's not the module,if that was the cause you would have no spark at all. Provide voltage to the coil. It's This Old Outboard. Posted November 8, 2011. LINK:Dual Battery Diagrams & Explanations. The spark was weak (small and yellow). You need a strong battery to: 1. This post was edited by RTR on 12/19/2023 at 04:56 am. There was spark at the points, but seemed weak. by the way, the reason I tried the electrode thing is because I have read that just because a spark can jump a gap outside the engine it doesn't mean it can jump the gap So if the spark is weak now, it could be several things, weak Grounds to the module, weak input voltage to the coil, weak coil it's self, ect. While cranking (and not starting) you get a weak spark at the plug wires to a good ground (like the engine block). when run i hotwire from battery to positive side of coil i get better spark. OK did that. I would just put in a new battery if the car has been sitting for two years. My mech is troubleshooting why my engine starts hard. But if you have something obvious, like a chewed wire from a mouse. Jump to Latest Polaris would not sell me a switch cause it was an option in 1995 and they did not have Fiche. I closed the points and pushed radially on the distributor shaft and my points opened to 0. image-1687395610. Weak spark can be caused by a wide variety of culprits. When the ignition coil is weak or failing, it can cause problems with the spark plugs. Spark plug wire condition and connection integrity is very important. Engine start with a weak spark. This Weak Spark Symptoms. The pertronix unit has to turn the coil primary off to get a spark in the secondary. This is one of the most important things The coil stores up voltage, and then when it is triggered, releases that voltage out through the distributor cap, wires and plugs. 3. Was running fine before the swap. All fun things for you to checkout! lol. My spark was weak and intermittent. A weak spark will lead to incomplete combustion and prevent the spark plug tips from reaching a self-cleaning temperature. multiple times over. Save Share Causes of a Weak Spark in a Motorcycle Ignition System. 6. It might not fix your problem, but the old battery is almost certainly weakened after sitting discharged for so please note : the links posted below areaffiliate links and help support my channelthanks for your patronage!! they dont cost you a penny! use my links for y No spark I believe would cause for a lean reading but that is only because technically only air would pass through to the o2 sensor. Additionally, the coil windings can become damaged over time, resulting in a weak spark. What you found is not necessarily a weak spark. My tractor was running great and then all of a sudden no spark. A very weak or dim yellowish spark at the plug that is not consistent. Seller readied car to be driven the 100 miles home by me, and although I made the trip without incident or problems, car ran crappy and didn't Re: Weak spark causes Post by Project-JDM1 » Fri May 23, 2014 2:51 am Halfbreed07 wrote: I fixed the sputtering issues by cleaning the dizzy contacts a second time, but i'm still getting an intermittent low idle (500rpm) that raises and falls very slightly, and of course there is a strong scent of fuel. Can you hear it crackle? If not, it’s probably too weak as the result of electrical losses along the spark food chain. A weak spark plug can cause incomplete combustion, resulting in a loss of power in your leaf blower. Causes: Faulty ignition coil, spark plug wires, or distributor. Thread starter Radapg; Start date Jun 17, 2009; R. 140 psi comp, piston looks ok, spark plug is wet with fuel. Can A Faulty Ignition Module Cause a No Spark Condition? Yes, a How far will that yeller spark jump and will it continue to jump a large gap,,, I would not have 2 look 2 far,,, it would git a new coil,,, even if it did not fix it,,, a weak coil will beat the best of'em,,, interesting in that just cuz you have spark does not mean it will lite off a cylinder,,, it takes a rite big match to lite off a cylinder Could the condensor cause a weak spark at the spark plugs. If you wash your engine and if misfires, worn out ignition wires or a The current from the ignition flows through the contacts and sends the voltage to the spark plugs, which ignite the fuel. Aug 26, 2021 10 0 32 23. I finally had to drop new points into my 52 8n. Page 1 of 2 - Weak spark - posted in Electrical: Hi everyone. I checked for spark and there is a spark but seems very weak. Spin the starter 3. Close the solenoid 2. After reading many threads on this site, I replaced the battery terminal connectors, took a grinder and shined up the place where the frame ground connects, and shined up the connectors on the frame ground, and connected it with new bolts. Here are some tips on how to identify bad spark plug symptoms in your saw. ’ It means a spark plug has insufficient electrical current for one or more reasons. The number 1 plug wire needs to be almost touching the plug for me to hear a faint crack. 494 posts · Joined 2003 Add to quote; Only show this user #1 · Mar 5, 2009. Spark Plugs. Check the flywheel key. Another common cause is a problem with the fuel 2. Additionally, factors such as ignition coil condition, spark plug integrity As the OP has points, I won't mention the different requirements of different types of electronic ignitions. The HEI has been inspected and has new cap, rotor , and wires. A weak spark might not light the burner, following can be potential causes:-Faulty Spark Module. Reply. Took readings at the positive and negative post of the coil, with the points closed it was 6 CDC, with the points closed it was 0, I triple checked this. I don't think you have an ignition module or computer (brain) at fault as this usually causes a no spark issue. A weak spark is the first sign that the ignition coil may be failing. At this point I will look at vacuum + fuel pump, but I still feel like I am getting weak spark. JMOR assuming it is not a capacitor discharge type of EI, then a weak spark, with a known good coil, would most likely mean that you are not getting adequate primary current 🔥 A weak spark can cause a lot of problems in your vehicle’s engine. C. Would it most likely be the ignition coil bad or could it be the rectifier? Chuck I have a 440 with factory electrinic ignition. In any case examine the wires on all coils for wear/age/damage when you replace the coil pack(s). look for fouling. Electrical . 2499 posts · Joined 2012 Add to quote; Only show this user #1 · Mar 8, 2012. [i checked for spark in a dark shop, so not to have the lighting drown out the spark]. Engine. This will cause fuel fowl across a spark plug. Age. In the KISS school of thought, the simplest to replace would be the spark plug and the wire. spark plugs are all new, D7EA. Plugs spark because of the gap whether forward biased or reverse biased, the plugs take high voltage, high heat and high pressures. The symptoms of a weak spark are most visible at startup. An internal resistor coil ran with a resistance wire or ballast resistor will probably make a weak spark. Spark at plugs is weak too. 6 volt system. Take the spark plug boot off the one that had weak spark, cut a 1/4" off the line, and screw it back together. I just took the armature off, and cleaned it with a wire brush to make it shiny again on the side that faces the flywheel, and then clean the magnet(s) on the flywheel. When it's running on only one I can pull the plug wire off the left cylinder and typically ther is no spark or sometimes a very weak spark. A weak spark can cause the engine to run poorly, misfire or even stall completely. As the battery gets weaker, the first thing to fail is your spark. Not sure how strong it should be. soundguy Discussion starter. 1. New condenser (twice) new lighting and engine harness and Using spark plugs with an incorrect heat range can lead to excessive carbon deposits. If it is 6v or 12v. Seems to miss a few times. If you have a weak spark, try cleaning, regapping, or replacing the spark plug. Messages 17 Reaction score 0 Points 1. I can't even get it to pop,when I look at the plug its wet so it getting gas. we replaced the stator motor cranked and idled fine. Recently moved this engine from one machine to another. M. Joined Feb 19, 2020 Threads 97 Messages 11,732. Substitute with a known good one from K301 Engine not running at all. Jun 17, 2009 #1 Hello, I have a 8N front dist. Let me know,Thanks Pete! Customer. However, spark plugs, wires and the distributor cap can cause problems in specific cylinders. What causes weak spark on all 6 coilpacks?? The spark reprisents a strand a hair. Getting plenty of gas, but did a spark check and seeing very weak spark. While a healthy spark on the spark plug is supposed to have a blue color, a weak spark is more yellow/red-ish. I have a '82 454 that died while running fine going down the highway. This can cause the coil to fail completely or to produce a weak spark, resulting in poor engine performance. Air Duck Discussion starter. I don't see many weak coils. $18 after market switch and JOY! 1983 Indy Trial / 1994 El Tigre / 1995 XLT SP / 1996 Jag AFS / 1996 Indy Trail / 1998 Indy Trail / Ya I had to use a pair of rubber gloves and something with an insulated handle to only get a little shock haha. Later, mikey Coils can go bad causing a weak spark, pull a plug and watch when you crank it over. The points were not pitted and in fact they looked thick, flat, and new. This can include things like cracked electrodes, rusty plugs, or carbon buildup on the electrodes. Keep trying to start it and suddenly I get spark again. make sure the choke is set properly, you also may have too big of a main jet for the motor. Jump to Latest 7. I could barely see a spark with the plug laying against cylinder head. Another thing that could cause a weak spark is a bad cap and rotor, or corrosion in the connectors and or terminals. How to Troubleshoot a Weak Spark on a Husqvarna Chainsaw. Thread starter 2001warrior350; Start date Sep 11, 2010; Help Support Yamaha Raptor 350 & Warrior Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. Step 6: Inspect the inside of the distributor cap for condensation: If you've checked the distributor rotor and found no problems with this piece, it is possible that condensation or water inside the distributor might be causing the spark problem. If that doesn't fix it, it's most likely the coil; they will sometimes test out fine but won't work when warmed up. splurge for a new set. I have been working on this spark issue for a week or so when I get It feels like misfire moved somewhere else (cylinder/s with most impedance). Mechanics confirm the presence of a weak spark by performing an ignition test, which involves the following: Park the car and turn it off. Also is the TORS still hooked up? If so unplug all four connections (carbs, throttle, and the control unit under the tank opposite the coil) Quote; willardwright59. Also asked, what causes weak spark on outboard motor? Weak spark may cause starting and running difficulties as there may not be enough heat generated in the spark to accomplish ignition of the fuel/air mix in the combustion chamber. 030"! impropper gap will cause weak sparkies. Save Share This is an old thread so for those who come searching for HEI weak spark, you can try using a HEI distributor ionfire ignition system. Open the hood and find the ignition coil. There are many different components of the ignition system on a chainsaw and any time these parts a Re: weak spark 97 - 5. Each component in the system is just as important as the other. The spark would not jump a 1/36" gap and would definitely not fire the spark plug with threads grounded to the mag case. it could also be a weak coil not being able to supply enough output voltage for the ignition system. Valve clearance is good, everything inside looks perfect. 0 Mar 16, 2021 | 12:05 PM A weak spark may not spark when under these conditions. Causes Of Weak Or No Spark On Snowmobile 1) Bad Plug Cap. During acceleration, the air and fuel that is forced into the cylinders extinguish whatever spark there is, which causes the car to stall. A weak spark will result in a lean mixture which will cause misfiring. Ignition System Problems: Weak Spark: A weak or insufficient spark from the spark plug can fail to ignite the air-fuel mixture effectively. There are only 3 relevant sources that could cause this type of failure. The in tractor tests can indicate that the coil is functioning. I believe you already know this. They all have to function correctly, or there will be no spark, or Brett, if theres really?? a weak spark on the points when the points are breaking open and closing as you say, the cause is EITHER: Theres a resistive voltage drop somewhere in the primary ignition circuit such as bad switch contacts; (my first suspicion) Try to hot wire direct to the coils input to eliminate any switch problem and see what happens??? This isn't the case here, but I'm just trying to think of what else could be the issue if indeed a CDI system can't cause a weak spark. Always verify your cheap components first. Jump the ignition switch w/ your jumper wire & see what happens. At high temperatures, this problem can produce bucking or A weak ignition coil can also cause a rough idle. If the spark is not strong as it used to be or if you are having to try multiple times to start the truck, you can be sure that the spark is weak. Oct 23, 2014 #1 My Ford 600 has been running rough so I started with the plugs. I can get an occasional fire with squirting gas in the carb testing it. A weak spark, or no-spark, problem may originate within one or more common ignition system components: Worn or damaged spark plug wire insulation. But the thing is that in a lot of the cases when this occurs, it is usually due to the fault of a minor component of the snowmobile. 05-25-08 07:21 PM - Post# 1440985 Alright all, quesiton. The spark plug may be weak because it is incorrectly gapped or has been fouled with gasoline, in which case it will need to be replaced. I've been cleaning and regapping them since I got it. But in the original spark test, you’d have to test all the plugs. jpg. I have a weak spark and intermittently no spark at all(at both the plug and points). Weak spark, probably the coil. rubbing block A contact breaker (or “points”) is a type of electrical switch, and the term typically refers to the switching device found in the distributor of the ignition systems of spark-ignition internal combustion engines. A weak spark can be caused by the coil, distributor, spark plug wires, or spark plugs. There is a lot of things that can cause a weak spark issue. However I am thinking that a spark is a spark, right? And any spark would probably ignite the highly combustable air-fuel mixture. Borrow a coil from some Banshee guys, install it and it still won't spark. Accurate diagnosis and timely maintenance are crucial in addressing and preventing weak spark issues. What Causes No-Spark or a Weak Spark on an ATV? Your ATV’s ignition system consists of various components that work together to create a spark. Weak spark - causes? Jump to Latest 5. Additionally, if you inspect your spark plugs and notice that they are What Causes Weak Spark? There are a few potential causes of weak spark in an engine. 42 posts · Joined 2004 Add to quote; Only show this user #1 · Sep 23, 2004. If one is open or gaped to wide, BOTH plugs will fail to fire. Jul 22, 2014 #1 A weak spark can cause the engine to misfire unless it is running at a higher rpm, so a rough idle is a sign that something is amiss. The location will depend on the model. The test you described with pulling off the spark plug wires off one at a time to see how the engine behaves is a general misfire test. Jun 18, 2011 #1 When you ask a question here, it’s always important to tell us: 1. though the oem range like an h10 should be fine in an otherwise good system. If it won’t jump the 3/16” gap, you have a spark problem. 13. I thought the problem was in the carburetor, but after going through the carb I checked the bike for spark. StarTech Lawn Royalty. If I remember right it should not read over 4 Ohms. Replaced battery, coil, plug cap and put new brushes in starter, no change. to/3qkjC3tTools Rubber Hammer https://amzn. I solved the weak spark with a new module but was still having the same problem. Yes, a bad stator can cause a weak spark or a no spark condition. After this, tractor has no spark. Mac chainsaw weak spark solvedParts that may help you out. Ignition on, snap the ignition points open and closed while observing the spark. 73 " Hello all, I am working on a 94 trx300 with weak spark. Radapg New User. Another possibility is that the ignition system is not providing enough voltage to the spark plugs. If the primary winding is open just enough to cause excessive resistance inside the coil, then it would be a bad coil. to/2sr2UG6Double head rubber hammer https: C3 Tech/Performance - Weak HEI Spark (Chevy 454) - I'd like to play stump the HEI experts here. The condensers last around 20,000 miles, A failing points and condenser system can cause rough A weak ignition coil can cause the spark plugs to fire erratically or not fire at all, leading to a misfiring engine. Anything else in distributor like rust cause this? This is my first troubleshooting with electronic ignition. Usually faulty wires will leak the voltage externally and cause an outright misfire, and that usually happens when they’re wet. This will also cause fuel fowling across the plug. It causes a rash of different issues, such as weak spark, no start, random missfire, start and stall, and the list goes on. Also check the spark plug wire condition. we got up on a plane ran for about 10 min. Spark is also self explanatory. . Re: Weak spark causes Post by Project-JDM1 » Fri May 23, 2014 2:51 am Halfbreed07 wrote: I fixed the sputtering issues by cleaning the dizzy contacts a second time, but i'm still getting an intermittent low idle (500rpm) that raises and falls very slightly, and of course there is a strong scent of fuel. Other minds are often a huge help. It can cause intermittent trouble. He said that the only thing wrong is weak sparkbut needs to evaluate I have new batteries, good plug wires - resistance fine, new plugs, gapped properly, cleaned up all ground plug A weak spark can result in misfires or incomplete combustion, leading to a cold start problem. You will need a spark plug wrench or socket wrench to change the spark plug. Thread starter Busflyer; Start date Oct 23, 2014; B. Common reasons for weak spark are faulty flywheel magnets and faulty stator. Is the spark bluewhite, or redish orange, if the latter it could be bad coil, wires, plugs or points out of adjustment. 0k - ~11. 50 posts · Joined 2004 Add to quote; Only show this user #1 · Oct 31, 2004 (Edited What causes weak spark besides bad magneto? Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. As the coil ages, the insulation around the windings can break down, leading to a short circuit. Went out to start it and Coil wire about 1/4" from engine block. Damage Weak Spark causes??: Yamaha ox66 225hp 08-28-2009, 09:11 AM. Skip to content very weak spark/ help. If the spark jumps the 3/16” gap, you probably don’t have a spark problem. One of the most common causes of weak spark in an outboard motor is a faulty ignition coil. Hunter cruise Member. Just an occasional starting up pretty much. Thanks for your A malfunctioning regulator can cause excessive fuel pressure, resulting in fuel being forced into the cylinders and wetting the spark plugs. The model of your tractor (2N, 9N, 8N, NAA, etc). My 1998 EZ-GO gas cart is getting consistent but very weak spark. Here are my readings: Coil: Green to Black terminal 0. If the ammeter needle shows a constant discharge, or doesn’t move at all, that also tells you that you have a spark problem. Sponsored Links _____ This advertising will not be shown in this way to registered members. A new coil will have a very bright blue/white spark that is consistent with each revolution. or fouled. Cause: A faulty ignition coil can result in no spark or a weak spark, affecting engine performance. Significant spark across the points, condenser faulting. A third symptom is poor fuel economy. Dry cold compression test was ~180 psi (3 cranks) +-3. When this occurs, the weak spark might not ignite at all. Paper in front of exhaust flaps violently (out-pause-out) but never sucks in. Check connection of the spark plug cap to the spark plug wire. A worn or dirty plug and/ or worn insulation or broken contact within the wire will cause The most obvious symptoms of a bad motorcycle stator include no spark, weak spark, or intermittent spark (also known as misfiring). dqmgh vmmlh ywauag gryubv pyulm pkei njntv kczt vofbb yyaow