Skip the auto shop - Our mechanics make house calls

Q: Rough idling

asked by on

The car idles rough.

A: Hello. This could be caused by a variety of...

Hello. This could be caused by a variety of things. It could be that your spark plugs or coil packs are misfiring. This means that the coil pack is not sending the proper electricity to the spark plug. It could also mean that the spark plug is not using the electricity from the coil pack properly. Another possibility is that you may have a vacuum leak. A vacuum leak happens when air leaks from something that air shouldn’t be leaking from. This would cause the truck to run rough. You could also have a problem with the mass air flow sensor or cam sensors. These are sensors controlled by your car’s computer, and if the computer reads that these sensors are not working, the Engine Light will come on and the truck could run rough. I would recommend a diagnosis of the truck by a certified technician, like one from YourMechanic. They will be able to determine what is causing your engine to run rough and make the necessary repairs.

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 low at stop

If you have a Check Engine Light, I would start there. Any codes that are found will aid in the diagnosis of your issue. It is possible that you could have an issue with your idle air control valve. I...

Q: Car will turn over but not start - 2005 Kia Sorento

Hi. There is a good possibility that the timing belt has broken and it is causing the car not to start. The timing belt is what keeps the engine in time so it will start and run. If this belt...

Q: Bad idling after coolant temp sensor replacement

If you have a bad knock sensor, then the engine timing may be going too low and causing the low rough idle. If the scanner gives a code, then have it diagnosed and fixed. A vacuum leak will also cause...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.