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Questions tagged [ignition-coil]

A component of the ignition system that, by induction, creates the high voltage required by the spark plugs.

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74 views

2 Stroke engine magneto ignition system

I've got a 2 stroke 1 cylinder engine and its ignition system doesn't seem to work. I'm having problems with my magneto ignition system and I need help connecting everything up. I think I've ...
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1answer
37 views

Do spark plugs need changing if one ignition coil cable broke

A friend of mine had one of their ignition coil snap in half, which meant one cylinder wasn't firing. She drove for approximately for 10km, before getting back home and finding out what was wrong. We ...
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161 views

What would cause a BMW 3 series E90 to misfire until the engine has warmed up?

I took my car to a mechanic because of misfiring issues. He said his computer told him it was an ignition coil pack issue, specifically coil 1. Anyway, he changed it and the car was still misfiring. ...
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1answer
52 views

After mechanic work, car starts fine but accelerating stalls the engine

I own a 2003 Mitsubishi Lancer, and have been the only owner and mostly the only driver. About a year ago I had a weird misfiring problem where if I pushed the accelerator down more than half way it ...
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1answer
43 views

What an ignition control module is needed for?

I have a Chevrolet S-10, according to the the Ignition System Circuit Diagram the ICM gets an Ignition Control Signal from the PCM and sends a Switching Signal to the ignition coil. As the Ignition ...
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1answer
40 views

ignition coil or cam sensor or pcm making misfire in exhaust possibly?

I am not able to get the jeep to the auto parts and get it's diagnostic but I'm wondering if the coil pack could be my problem? I've tried to deduce the misfire for days and have read and tried ...
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1answer
390 views

Ignition coil upgrade

My motorcycle felt unresponsive these past few days and found out that it was caused by a weak spark because the ignition coil is about to go bust. Since I am thinking about doing an upgrade to a ...
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57 views

Why would the same ignition coil fail 4 times in my 2012, 5.3 Silverado?

The first one failed at around 90K miles, the second around 130000K, the third around 165000 and again this week at 167000K. I've changed spark plugs and plug wires. Always the same cylinder and the ...
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1answer
252 views

What would cause repeated failure of ignition coils?

I have a Nissan 2008 Rogue, which is fired by ignition coil. I've been experiencing repeated singular ignition coil failures every 1-2 months now for the past 6 months. I'm on my 6th failure, never ...
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234 views

Can I use a DC ignition coil for my motorcycle without damaging anything?

Last night I followed this guide I found on the internet http://waynescyclegarage.mysite.com/custom.html showing you how to rewire a Honda SL engine so that it can run without a battery.. and I got it ...
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1answer
52 views

Why can't I get a spark?

I have an early 70's Honda SL125 engine and I'm trying to wire it up so that it can run without the battery. I found this guide http://waynescyclegarage.mysite.com/custom.html and I've followed it and ...
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293 views

Starter grinding on flywheel only when ignition system is connected

I have a boat with a 1990 GM 305 in it. Last year I replaced my computer controlled ignition system with a basic HEI / distributor based ignition system. Everything worked great for the entire boating ...
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1answer
1k views

Broken ignition coil: spark plug's fault?

Two days ago my Opel Corsa D LPG's engine started to misfire, and by means of an OBD interface I found out it was cylinder 1. First thing I thought about were the spark plugs, as I haven't changed ...
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193 views

Finding a Capacitor (Condenser) for an ignition coil

How would one go about calculating the necessary specs for a capacitor to be paired with an ignition coil?
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48 views

Ignition Coil Not Working With Points/Stator Current

I have an Ignition Coil connected to a points and the motors stator. I have tested both with leds and the power generated by kicking the motor over blew both, the stator produced a solid light and the ...
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2answers
128 views

Diagnosing a boat that wont start

Having some problems with my '92 Boston Whaler Rage jet-boat again.... See this post for all relevant boat info: Starting a 2 stroke jet boat after several years Ok, so I did basic troubleshooting, ...
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1answer
2k views

Testing a motorcycle ignition coil and spark plug

Here is an image for reference: I am attempting to test this ignition coil and spark plug. How do I go about connecting this to its corresponding 6v battery to get it to fire. As well I will be ...
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1answer
837 views

How does this ignition coil work? Why are there two wires, and where should they be connected?

I'm having ignition problems with my car (1985 Suzuki Samurai). Sometimes the engine will die randomly while driving, and often when warm it will have problem starting. I bought a new ignition coil, ...
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301 views

85 Suzuki Samurai - Engine sometimes stalls, and hard to start when warm. Probably electrical problem

I'm having a problem with my car. Sometimes when engine is warm, it will strugle to start (starter runs fine, but no ignition). It also happens (rarely) that the engine just dies while driving. It ...
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1answer
132 views

Third misfire code on different cylinders in two months

I have a 2002 Mazda MPV with 133,000 miles. Two months ago, my mechanic replaced the ignition coil on cylinder 4 due to a misfire. Two weeks ago, he replaced the coil on cylinder 6 due to a misfire. ...
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2answers
182 views

Does the E90 320i 2006 use the same Coils and O2 sensors as the E90 328i?

I'm looking on eBay for replacement parts for my E90 320i 2006, but I can't find anything for it. In the results I always find replacement parts for the 325i, 328i, etc., but not for my 320i 2006. I ...
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1answer
275 views

What creates resistance in ignition coils?

Ignition coils are basically just copper wire wound around an iron core. Normally, I would expect copper wire, measured with a ohmmeter to show close to zero resistance. However on my vehicle for ...
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2k views

Engine not starting after melted Ignition Coil

Car: 2004 Honda CRV-EX (the moonroof one) Miles: 220k~ Issue: I had cylinder misfires before on this car and they were fixed with new sparkplugs and ignition coils. Recently I've had more misfires ...
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1answer
225 views

Renault Megane Sport II 2006 petrol Coil Problem

I have a problem with Renault Megan Most likely its something with the coil but its really weird. When i turn on the car its fine i drive for about 20-40km and the car starts to lose power like a ...
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0answers
129 views

Can pressure caused by temperature cause ignition coils to unseat?

I've got a Rotax engine that looks like this from the top: The ignition coils look like this when removed: Recently two of the three ignition coils unseated after approximately 10 minutes of ...
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1answer
38 views

Do ignition coils on small motors (lawn mowers etc) determine timing?

I have a Stihl weed whacker for which I haven't been able to find an appropriate ignition module (coil). I purchased one for a similar model that would fit and now the whacker has spark again, however ...
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3answers
3k views

Motorcycle misfires

I own a 1990 Suzuki GSXR 750, I, bought the bike about a month ago. The first time I took the bike out for a ride I noticed that when you accelerate hard and the engine is at high revs it feels as if ...
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1answer
6k views

Ignition coil overheating: what to blame?

I have got in the past ignition coil overheating, making the engine run very erratically and in some cases it even wouldn't run at all until the coil got cooler. In one occasion I changed the coil for ...
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2answers
8k views

how many amps do a ignition coil draw?

I know that the Peak output voltage in a ignition coil is between 10,000-45,000 V "Or so I heard" but how many amps does the ignition coil draw from the 12Volt side ? I heard it was small....
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1answer
1k views

Misfire in single cylinder 4 stroke engine

I am having Apache RTR 180. Tech Specs:- Displacement: 177.4 cc Cylinder arrangement: Single Maximum Power: 12.52 kW (17.03 bhp) @8500 rpm Maximum Torque: 15.5 Nm @ 6500 rpm Bore x Stroke: 62....
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1answer
14k views

What are the benefits of direct ignition (coil on plug) system?

Most recent gasoline cars have a direct ignition, also called coil on plug, system where each spark plug has its own ignition coil. Before that, cars used a common ignition coil for all cylinders. ...
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2answers
2k views

My 2008 Hyunai Accent is misfiring on two cylinders, bad gas?

Update: So I went full steam ahead today. Got the new valve cover gasket ($20.99 at AutoZone), unscrewed all the 10mm bolts, pried the cover off, hey! No obvious breaks in the seal! Well, that's good ...
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1answer
400 views

Do these coil on plug waveforms suggest I have a bad engine controller?

I have a missfire on cylinder 3. I have swapped the coil from cylinder 6 and 3, but the missfire remains on cylinder 3. I have also done the following: - replaced all spark plugs. - checked the ...
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3answers
438 views

Can I replace my ignition coil with a ECU?

Can I take the ignition coil out of my 1965 dodge challenger and replace it with a ECU? If I can, how will I go about doing it? Can it be a simple replacements?
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2answers
5k views

Multiple misfire codes with oil in coil pack well

On Halloween, the check engine light on my 2007 Honda Odyssey EX started flashing. Read the codes which were a random misfire and misfires on 2,4,5, and 6 (P0300, P0302, P0304, P0305, and P0306 ...
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1answer
32 views

ignition lead replacement

I drive a 1998 Ford Falcon AU with 210,000 km on the clock with original 18-year-old ignition leads. I only drive about 10,000 km per year. The car runs perfectly. Should I replace them? PS. I replace ...
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2k views

Do primary and secondary coil resistances correspond to number of windings?

An inductive ignition coil is basically a step up transformer, in which the ratio of windings between the primary coil and secondary coil determines how much the primary voltage is multiplied by. I ...
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1answer
545 views

Can an ignition coil melt-down?

I'm having trouble with a John Deere 210 Lawn & Garden Tractor. I mowed happily for an hour in the morning, then it quit on me after five minutes of mowing in the afternoon. No noises, just died;...
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3answers
3k views

How is ignition coil feedback useful?

Today I learnt that some engine management setups demand a feedback signal from the ignition coil. What does it do with the signal though? Is it just for diagnostics?
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1answer
991 views

04 Lexus ES330 Multiple Ignition Coil Failures / Poor Coil Feedback Signal

I was asked to look at a Lexus ES330. The complaint was the car wouldn't go over 20MPH and would fall on it's face. The ECM was replaced and problem persisted. One coil was replaced around a year ...
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1answer
538 views

Can Getting Fuel Injectors or Ignition Coils Wet Ruin Them?

I have a 2005 Suzuki Forenza Wagon where I recently cleaned the engine compartment. I was a little careless during the cleaning and water got in under the spark plug wires to sit around the top of the ...
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1answer
756 views

Nissan Altima catalytic converter ruined twice in one month

My 2005 4-cylinder 2.5s Nissan Altima has been having major issues for the past several months. My mechanic replaced the catalytic converter and a month later another mechanic said that the catalytic ...
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2answers
37k views

How to know if the spark plug or the ignition coil needs to be replaced

I have a 2002 E39 520i. One of the cylinders has stopped working (or misfiring) and I am hoping it is because no spark is generated. I am very new to engines so bare with me please. :) My question is:...
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1answer
62 views

Coil On Plug, Testing The Primary Coil

Are there any alternatives for scoping the primary coil on a COP system other than using a low amp probe? I'm guessing backprobing doesn't work since the ignition control module is built into the coil ...
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2answers
4k views

Coil popped out of head

I've got a 1999 F250-SD XLT 4×4 that the coil just popped out of the head what would cause that? I've not done anything to it yet
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1answer
770 views

What is a vibrator on a Model T ignition coil for?

In this post here What vehicle does this ancient ignition coil fit? there is a device that is cited in @paulster2's response that is called a 'vibrator'. Here's the diagram from his answer where it ...
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1answer
2k views

Yamaha Seca - Motorcycle Idle problems

My motorcycle (1982 Yamaha Seca 650) has had a strange problem with the idle for a few years now. I have not been able to diagnose it and I'm hoping that someone here might be able to help. It starts ...
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1answer
396 views

How Common are Voltage Drop Problems?

After watching this video on voltage drop, it makes me feel like testing the resistance of various sensors and accessories with my multi-meter isn't really a reliable test of anything, since I can see ...
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1answer
389 views

How does the ignition system control the Energy of the spark?

An automotive ignition system needs to provide a specific amount of energy to properly ignite the air/fuel mixture in the combustion chamber. Energy = voltage * amperage * duration. A specific ...
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1answer
2k views

Are There any Benefits to a High Voltage Coil Pack?

I'm considering replacing the coil pack on my 98 mazda 626 GF 2L, and am looking at a standard replacement at about $15, a standard replacement with 10 year warranty for about $21, and a "high output" ...