Skip the auto shop - Our mechanics make house calls

Q: Car misfiring

asked by on

My car is misfiring on an unknown cylinder.

Hello, since the car is misfiring there is probably a Check Engine Light that goes along with it. A simple code reader can give you the code associated with that cylinder that is missing. The next step is a little more involved, which is finding the cause of the misfire. To narrow down the misfire, this would require testing of the ignition system which consists of the coil, spark plug, and high voltage system. If the ignition system is okay, then the fuel injector will need to be checked. You may need the aid of a mechanic to check for codes and data, and perform any testing as needed to properly diagnose your engine misfire.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Ran the car with no oil and won't turn on

Hi, thanks for writing in. If you have ran your engine with no oil in it, it is almost a certainty that it will need to be replaced. If it is not starting now due to the no oil issue...

Q: Suspension Problems

Since your issue is more noticeable when you hit bumps or potholes, your problem may reside with the spring/strut assembly. It could be a worn or broken strut, worn strut mount, or even a broken spring. If you raise the...

Q: Car is running sluggish and the engine light is on.

Hi there. Check the ECM (computer) for any active or pending codes that are contributing to the engine light being on. This will give you a location to start with for diagnosing your vehicle and why it is running sluggish....

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...