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Ignition Coils

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How Are High-Performance Ignition Systems Different from Standard Ones?
Once upon a time, there was only one type of ignition system. It used a distributor, points, a coil, and was subject to significant wear and tear. Then came the electronic ignition, which replaced...
How to Buy a Good Quality Ignition Coil
Ignition coils operate in a very similar fashion to a transformer; with a 12-volt power source that produces output current simultaneously to an input current that’s being applied. By creating an efficient magnetic field,...
How Long Does an Ignition Coil Last?
The combustion process that happens when your car is cranked is vital in order to get the car moving. In order for this process to take place, a number of different components...
How to Test a Spark Plug Ignition Coil
An ignition coil is a vital component of today’s modern engine management system. Virtually all vehicles manufactured today use ignition coils to provide the spark for the engine’s spark plugs. An ignition...
What Does Ignition Timing Mean?
Timing – it has a couple of different meanings when applied to your car’s engine. One of the most critical is ignition timing (not to be confused with engine timing). Ignition timing refers...
How to Replace an Ignition Coil
Your spark plugs work with the ignition coil to receive signals from your vehicle’s computer. A bad coil can cause driveability issues like stalling.

Related questions

Question
What is the rectangle part of a coil pack called?
Hi there. For the vehicle, the part that the coil pack is attached to that was broken is called a coil pack bracket. Sometimes the coil packs are sold with the bracket and sometimes the coil packs are sold separately....
Question
Spark plug replacement on 2011 BMW 328xi
Your vehicle was equipped with 100,000 mile spark plugs. The first recommended change is at 100,000 miles. If a Diagnostic Trouble Code has led you to test the ignition system and you find that an individual plug over coil tests...
Question
Crank no start. Not switching signals at the ignition coil.
Hi there. When your friend removed the spark plug while the engine was running and it was not grounded, the lazy spark may have shorted out the module in the distributor or it could have shorted out the coil in...
Question
Ideas of what my problem is?
If you had a scan and it shows a misfire in a cylinder then it can be caused by ignition coils or plug wire boots shorting. Have the cylinder with the code to it checked for a defective coil, wire...
Question
2012 Elantra - I'm changing #4 cylinder ignition coil but i'm not sure which one it is. Anyone know the cylinder order?
The No. 1 cylinder is the cylinder nearest the engine's crankshaft pulley. The No. 4 cylinder would be nearest the other end of the engine which is the flywheel (or flexplate) "end" of the engine. If you need assistance with...
Question
Where is cylinder 5 located at?
The cylinder number 5 is on the passenger side nearest the fire wall. Passenger side of engine is numbered 1,3,5 and drivers side is 2,4,6.
Question
Can it be determined which coil in faulty so that only that one will be replace? My 2006 Volvo S60 has been occassionally shutting
When the computer is tested for the misfire the computer should identify what cylinder is misfiring. If the computer does not log a specific cylinder misfire code then it cannot be determined to replace a single coil. Have the computer...
Question
Hello, I have two questions: 1) How often the Ignition Coil needs to be replaced? and 2) This model requires grease chassis?
Hi there. The spark plugs are rated for 100,000 miles for your vehicle, so you have about 5,000 miles left on their life for a decent spark. I recommend changing the spark plugs with the OEM parts to ensure a...
Question
Car stops when I slow down
Hello! If I am understanding your question correctly, it sounds like your car is stalling once the engine is warm for a period of time and will not start until the engine cools down. If this is correct, you may...
Question
Performance issues and check engine light
Hello. If the check engine light has remained even after the vehicle was serviced then either the issue is still present or another one has developed. Retrieving the trouble codes will likely reveal some insight on what the issue may...
Question
Engine stalls after warm up, then starter just clicks.
It sounds like you may have two separate issues happening related to potentially a bad starter solenoid (clicking sound at starter) and possibly a failing ignition coil causing the stalling and then subsequently not starting for 30-45 minutes until the...
Question
Randomly doesn't start
Hi There, What you are describing sounds like an ignition coil pack that may be failing. Ignition coils are prone to this type of erratic functioning when they are beginning to fail due to the temperature fluctuations under the hood...
Question
Need a quote price to replace the engine coils with new ones.
Billing question sent to CS for the replacement of all the ignition coils.
Question
Engine falls on face.
Hi There, As you may know, these codes relate to ignition coil malfunction which can cause the motor to struggle to perform as you have described. Some of the possible causes of these codes may be things like shorts...
Question
Three coils are misfiring. Do I have to change all three at the same time? Can I change the spark plugs first?
Ignition coils deliver the spark to the spark plugs. If you are confident that the coils are in fact misfiring, changing the spark plugs will not fix your problem. Ignition coils are coated with a varnish-like insulation that becomes brittle...
Question
Jeep shut off while driving.
This may be a sign of a faulty ignition coil. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly The insulation develops small fractures that open when heated and close...
Question
Shuts off while driving will not crank bac up for 30 or more minutes
This may be a sign of a faulty ignition coil. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly The insulation develops small fractures that open when heated and close...
Question
Car shaking in low rev, lack of power. Narrowed it down to faulty coil pack.
Hi there. It would be best to remove and replace all of the ignition coils that are not functioning correctly. Replacing all of the ignition coils will be good for the vehicle so you would be able to know what...
Question
Blinking engine light
The engine shaking and idling rough with a flashing check engine light is an indication you have a misfire in the engine. If you have a computer scan it should show ignition misfire codes to one or more cylinders misfiring....
Question
Can I used an ignition coil with the primary resistance per spec but the secondary with lower resistance.
Hi there. To properly repair your vehicle you need to use the correct ignition coil. If you do not use the right coil then it either will not work or it can damage the circuit and the computer. The resistance...

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