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Yukon

Tiny
YUKON99
  • MEMBER
  • 1999 GMC YUKON
  • V8
  • 4WD
  • AUTOMATIC
  • 115,345 MILES
My 99 yukon is idling rough about 500 rpm?
i think is not timed right
Saturday, February 19th, 2011 AT 2:25 AM

7 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
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?
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Saturday, February 19th, 2011 AT 7:25 PM
Tiny
YUKON99
  • MEMBER
  • 9 POSTS
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?
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Sunday, February 20th, 2011 AT 1:17 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The location is in the picture below.
Image (Click to make bigger)
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Sunday, February 20th, 2011 AT 4:09 PM
Tiny
YUKON99
  • MEMBER
  • 9 POSTS
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?
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Sunday, February 20th, 2011 AT 6:44 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did they give you any warranty, if so, talk to the people that did the work. What kind of work was done?
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Sunday, February 20th, 2011 AT 6:49 PM
Tiny
YUKON99
  • MEMBER
  • 9 POSTS
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.
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Sunday, February 20th, 2011 AT 9:38 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Good idea.
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Monday, February 21st, 2011 AT 3:58 PM

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