Q: Car keeps burning out ignition coil, same spot, not spark plug.

asked by on

My truck keeps burning out ignition coils in the Sams place and I checked the spark plugs and that's not it.

My car has 25000 miles.
My car has an automatic transmission.

Hello There, I would suggest checking the ignition control module. The ignition control module functions in two modes; the start and run modes. When starting the engine, the ignition control module allows full battery voltage to be deployed to the coil. This ensures there is a hot enough spark to start a cold engine when the fuel mixture is rich and the battery is dragged down from the starter. Once the engine starts, the ignition control module switches to a "run" mode. The ignition control module then reduces the voltage to the ignition coil(s) as the charging system comes on line, allowing the voltage to reach as high as 14.5 volts. In this case, if the ignition control module fails to switch to "run" mode after the engine ignites, this can overload the ignition coils, thus causing them to burn up due to an over supply of voltage. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your ignition system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car keeps burning out ignition coil, same spot, not spark plug.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 1998 Chevyc1500 once I crank it will randomly rev/accelerate and then it stops reving.

Hi Zoe. Thanks for contacting us today. In most cases, this type of problem is caused by a dirty throttle body, as carbon build-up and debris becomes trapped between the throttle blades. It can also be due to a damaged...

Q: Need a price for a wiring harness replacement on an '89 dodge ram d250 Cummins turbo

The wiring harness is not available on this vehicle and will need to be repaired. You will need to get the problem diagnosed first by a mechanic like one from YourMechanic. Usually this will be on a time and material...

Q: Rear wiper blade not working

The rear wiper arm may be stripped out. If you remove the retainer cover and then move the wiper arm by hand to see if the shaft does not move when you move the wiper arm. Replace the wiper arm...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...