Idle problem 2003 GMC Yukon
The idle hunts up and down for a few minutes after starting the truck. My scan tool never shows any malfunction codes. What could be causing this and what can I check to be sure? Thanks.
Forum Discussion
5 Replies
- You need intake manifold gaskets.
- Thanks.
enblethen wrote:
Some GM engines hae an "Idle Air Control" (IAC).
It is located on the lower portion of the throttle body assembly.
It sort of acts like a choke.
Not sure if your rig has one.
That would be my WAG as well.- Some GM engines hae an "Idle Air Control" (IAC).
It is located on the lower portion of the throttle body assembly.
It sort of acts like a choke.
Not sure if your rig has one. - Clean mass airflow sensor with electric spray you tube it for visual
