WHAT WOULD CAUSE THE ENGINE TO RUN ROUGH WHEN IDLING?

2002 GMC Yukon

Tiny

OffshoreDawg

September, 28, 2011 AT 12:57 PM

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

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Tiny

Dan_K

September, 28, 2011 AT 1:43 PM

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?

Tiny

OffshoreDawg

September, 28, 2011 AT 1:56 PM

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

rivermikerat

September, 29, 2011 AT 11:48 PM

Have you been able to resolve this issue OffshoreDawg?

Tiny

rivermikerat

September, 29, 2011 AT 11:49 PM

Check for vacuum leaks.

Tiny

OffshoreDawg

September, 30, 2011 AT 12:09 AM

I am actually at work - offshore. I will check it out when I go home next week.

Tiny

rivermikerat

September, 30, 2011 AT 12:12 AM

Ok. Let us know.

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