MY 99 YUKON IS IDLING ROUGH ABOUT 500 RPM? I ...

1999 GMC Yukon

Tiny

yukon99

February, 19, 2011 AT 2:25 AM

My 99 yukon is idling rough about 500 rpm?
i think is not timed right

FOUND 4561 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

7 Answers

Tiny

JDL

February, 19, 2011 AT 7:25 PM

Does it run ok at highway speed? Clean the throttle-body and check the iac. Any applicable trouble codes? If you have the spider fuel system, they are noted for problems. The fuel poppets may need cleaning?

Tiny

yukon99

February, 20, 2011 AT 1:17 AM

Yes it runs great like a dream. Just that is idling rough at a stop,
when the rpm is up by 700 is fine.
Whats the iac located?

Tiny

JDL

February, 20, 2011 AT 4:09 PM

The location is in the picture below.

Tiny

yukon99

February, 20, 2011 AT 6:44 PM

Ok i'll check it. Oh by the way there are no codes showing yet.
Thanks. But it couldnt be the timing of a bit, cause they recently did some work before I bought it?

Tiny

JDL

February, 20, 2011 AT 6:49 PM

Did they give you any warranty, if so, talk to the people that did the work. What kind of work was done?

Tiny

yukon99

February, 20, 2011 AT 9:38 PM

Yeah, I think they change the head gaskets. And I think they did something wrong or put something in the wrong place.
But yea im heading up there on saturday morning.

Tiny

JDL

February, 21, 2011 AT 3:58 PM

Good idea.

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