GMC YUKON 2003 ROUGH IDLE

[JOEYSIV]

I HAVE A GMC YUKON. IT HAS BEEN IDLING ROUGH IN THE COLD MORNINGS. SOMETIMES I HAVE TO HELP IT BY PRESSING THE GAS A LITTLE BIT TO HELP IT ALONG.

LOOKING FOR POSSIBLE FIXES TO BETTER IMPROVE THE IDLE.

ANY HELP IS APPRECIATED.

 

[rockola1971]

Troubleshoot leaking intake manifold, low fuel pressure, bad spark plug wires/plugs, etc. Getting check engine light? Codes?

 

[justirv]

If affected when cold, and more noticeable on cold mornings, shrinking intake manifold gaskets can be the issue. Definitely pursue the suggestions that @rockola1971 made. Consider replacing your knock sensors if pulling the intake.