something wierd happend today. i went to the store and when i came out i started the truck and after the idle went down it passed 500 rpm and went to like 200-300 rpm. thought that was wierd and thought it will adjust. put in reverse and it kinda wanted to die on me. i put in park and reved it up a few times but each time it would fall to 200 RPM. so drove it how i could home. and when i pulled up to the driveway no problem, it was idling normal at 500 RPM.

no codes poped up. only thing i can think of is that maybe my MAF wires are dirty?
any help or suggestions would be appreciated

 

mine does this all the time and have yet to find out the problem... and when it does do this.. by the time i make it to my dealer, the problem is gone. i even replaced my maf. and it still does it. im followin this post with great interest.

 

Wierd .. I never had this problem before. I did have something where I could rev the engine in park and it would drop down to 300-400 and come back up. I think it was crappy tuning though.

 

How many miles you got on it? May be some build up on the IAC port in your throttle body. It would be easy, and cheap, to remove it and clean it out.

 

mine has done it since around 20000 miles

 

I have 5k and mine has done - not often - but has done it
normally after the truck is hot - pull it in the garage - go into park
and almost ready to shut off..
dont know why
did it once a the movie theater parking lot...

 

Mine does this all the time. Hot or cold. One time it died making a U-turn on the street. Scared the **** outta me cause cars were coming from the other direction. I hope someone can figure this one out. I thought it might be my HPP3?

 

dam i didnt know this was a common thing. i just reached 50k like 2 weeks ago. is there somekind of TSB on this?
how would i ago about cleaning the IAC?

 

do you have any carbon built up in the TB? i know that causes sticky throttle but is there a chance it could block flow at idle?
this almost sounds like a computer or sensor problem tho...

 

mine does this too but only since i installed the whipple