Skip the auto shop - Our mechanics make house calls

Q: Car idles high

asked by on

My car is running rough. It idles very high when starting it or the engine is cold.

A: The main cause of this model car running ro...

The main cause of this model car running rough is the ignition coil. Normally, a misfire code will be generated and can be found by connecting a scanner tool to the cars OBD2 port and performing a scan. I would recommend having a tune-up performed on the car and replace the spark plugs and wires by a technician from YourMechanic. They are recommended to be replaced every 30,000 miles. A technician can also scan the computer codes to determine where the problem is coming from.

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・Save up to 30%

Get a quote

What others are asking

Q: Car idling up and down

This is a common issue. My first instinct would be to look for a vacuum leak. Air going into the engine is metered so that the ECM knows how much fuel to add for a correct mixture. If you have...

Q: Do you have to do a factory reset on my car ?

Hello. If everything was done correctly then it should start right up. If it is not getting spark or fuel then I would check the crank signal. If the crank sensor is not sending a good signal then the computer...

Q: Tires losing air

If you have chrome plated wheels, corrosion can build up much easier on chrome plates than steel wheel or alloy wheels. Corrosion is also common on alloy wheels. A puncture in the sidewall of a tire is non repairable unless...

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.