Mechanics

WHAT WOULD CAUSE THE ENGINE TO RUN ROUGH WHEN IDLING?

2002 GMC Yukon • 151,000 miles

There are times when it sounds and acts like it is going to die. The RPM's drop off and then come back up to normal operating range. Sometimes, it doesn't run rough. I thought it might have been bad spark plugs, so they were changed out. Could it be a bad spark plug wire or dirty fuel injectors?

Thanks,
Allen
Avatar
OffshoreDawg
September 28, 2011.



Is the "check engine" light on? Are there any diagnostic trouble codes (DTCs)? If you haven't changed the spark plug wires in a while, it's not a bad idea to put a new set on. When was the last time the fuel filter was changed?

Dan_K
Sep 28, 2011.
There aren't any check engine lights on. I will change the spark plug wires and the fuel filter and see what happens.

Thanks

Tiny
OffshoreDawg
Sep 28, 2011.
Have you been able to resolve this issue OffshoreDawg?

Rivermikerat
Sep 29, 2011.
Check for vacuum leaks.

Rivermikerat
Sep 29, 2011.
I am actually at work - offshore. I will check it out when I go home next week.

Tiny
OffshoreDawg
Sep 30, 2011.
Ok. Let us know.

Rivermikerat
Sep 30, 2011.