Skip the auto shop - Our mechanics make house calls

Q: rough idle

asked by on

On my 2000 gmc jimmy i have a rough idle what can i do to fix it

The fuel injectors on this engine can commonly get carbon buildup on the tips. This will cause the engine to run rough and have hard starts.

You should try running top tier fuels in our car that have cleaning abilities and add fuel injector cleaner into the tank with each fill up. Once you run at least 4 tanks with the better cleaning fuel and cleaner added in the tank see if the vehicle is runs better.

If the engine is still running rough then you will need to have the injectors cleaned using GMC’s cleaner and following the process for this type of fuel injection system.

I’d suggest you get this looked at by a qualified technician who can diagnose your rough idle firsthand and perform 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

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: What should I do when my engine revs up and down?

You first want to want to make sure that all electrical connectors at the throttle body are dry, free of corrosion and dirt, plugged in and making secure contact, particularly if you removed any during the service. Make sure none...

Q: My truck is running sluggish

Hi there, thanks for writing in. If the engine had non-fouler plugs in it then you need to do a compression test. If the engine is worn then it will need these plugs and may not be able to produce...

Q: No spark

This may be a sign of a faulty ignition coil. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly. The insulation develops small fractures that open when heated and close...

Related articles

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...
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.
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.