Skip the auto shop - Our mechanics make house calls

Q: Rough idle.

asked by on

I have changed plugs but still idles rough. Any advice?

My car has 75000 miles.
My car has an automatic transmission.

A: The manufacturer has a technical service bu...

The manufacturer has a technical service bulletin that calls for all spark plugs and plug wires to be replaced and then the engine computer reprogrammed to a new level using the factory DRBIII scanner. It is also possible that your car has a vacuum leak in the system, in which you would need to have the vacuum replaced.

To have the re-called spark plugs repaired, you can try to visit your dealer. However, if the problem is not solved by the manufacturer, I would recommend having the vehicle diagnosed by a mechanic, such as one from YourMechanic. They can come to your home or office to scan the computer and check the intake system to see if you have any vacuum leaks.

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: I can't tell if the lower or upper front control arms are going bad

If you have doubts as to any diagnostic that a mechanic offers, the fastest way to learn the truth is to simply ask the mechanic to show you the failure; that is, prove it to you. If he does, great...

Q: steady ticking sound from ac compressor

Hey there. The one in the video has a major problem with the pulley bearing getting ready to seize up. You can hear the noise when the A/C compressor turns off. These bearings will start to spin on the front...

Q: Engine shaking

Quite a few things can make an engine shake, especially at idle. Spark plugs and the ignition system, carbon build up in the combustion chambers, fuel injectors, vacuum leaks or engine mounts are all possible culprits. But one thing is...

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.