Q: Car is misfiring, oil in ignition coil & spark plug

asked by on

My car started misfiring after accelerating quickly on the freeway the other day. The ignition coils tend to go out so I immediately bought a new one and intended to replace it. However, when I pulled out the old one, it was covered in oil. In fact 2 of them were. Of course the spark plugs were covered too. The most common cause I saw was that it could be the valve cover gasket, so I made an appt to get that replaced tomorrow and intend to replace the plugs and coil myself after that. However, I have two questions: 1 - do I need to do anything in particular other than soak up the oil that was in there and 2 - is there any other obvious damage that driving on this would cause or other parts I should replace as a result?

My car has 136000 miles.
My car has an automatic transmission.

Soak up the oil in the hole and clean it out with brake cleaner. Then dry it before replacing the spark plugs and ignition coils. You should replace all 4 coils as a set with new plug wire boots and plugs. Be sure to do all of this after the valve cover gasket and spark plug hole seals are replaced.

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 is misfiring, oil in ignition coil & 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 Audi A3 2009 2.0 and when I press on the gas it doesn't go anywhere.

Typically when you have a vehicle where the engine is running and a transmission range has been selected and the vehicle does not respond to the range selected, you can have a slipping transmission or a loose or broken linkage...

Q: Q: Rough Idle

Since the check engine light came on you will want to have a computer scan for stored codes. This may indicate the cylinder that is misfiring or having issues and then further diagnosis on that cylinder can be done to...

Q: 2012 passat just started making brake noise - sounds like a dragging at very low speed as the vehicle is about to stop. Also, noti

This is a classic noise when brakes are due to be serviced. The fact that you only hear it at low speeds only means it isn't very loud as of yet. The brake dust on the rear wheels is normal...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...