high idle when cold...

[Gary101386]

I just got my truck a few months ago... now that its getting cold i noticed a new issue.

It seems the idle is pretty high while shifting. I'll press the clutch in to shift and the RPM's jump up to 3k, if i hold the clutch in it will settle back down, but im not sure why its doing this in the first place...

Could it be IAC? (idle air control)

 

[Gary101386]

anyone...?

 

[BRONCMAN]

Does it only do this when the engine is cold?

 

[bcammons]

Mine is doin the exact same thing but mine is a 4.0....... Mine does it all the time and Im pretty sure that mine is doin it cause whoever had the truck before me took out the t-stat and that is making it do this. Ive cleaned out my IAC and the only other thing I can think of is MAF.

 

[BRONCMAN]

I'd definitely get a t-stat back in there asap.