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・Fair and transparent pricing

Get a quote

What others are asking

Q: how do you know if you need a whole throttle body compared to just cleaning it or replacing sensors

I would recommend cleaning and replacing the sensors first. Generally, throttle bodies do not need to be replaced completely, but rather just need specific parts related to them replaced. I would also recommend checking the mass air flow sensor to...

Q: How hard is it to change the O2 sensors?

Hello. I have never seen all four oxygen sensors go bad on a vehicle all at one time. They will fail one at a time and the only time it would need all four would be if they failed one...

Q: Check engine and maintenance lights come on while bucking. But only when it's snowing. Otherwise everything is fine.

Hi there. What seems to be happening is the wheels are spinning out of control and the traction control is coming on. The feeling could be the wheels jerking the vehicle around and making your vehicle feel like its bucking....

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...