Strange idle issue...

NC3GTEG

Building Kick!
So this morning it was around 30ish degrees outside.. Started my car up and it ran fine for about 30secs.. then it started doing this strange rev bouncing thing all on its own? It would jump from like 900rpm ~ 1500/2000.. It would do this intermittently every like 1s.. I kinda freaked out so I just shut the car off and decided to take the truck to work this morning... This is the first time it has done this since I've owned it and I didn't want to risk an unfamiliar problem so I left it sitting.

What could it be, how should I approach this? Should I just seek a mechanic..? :(
 

rexpepper123

Active Member
you should search dude the best thing you could do. this prob been covered over 1000 times on here.make sure all vacuum lines are on where they go, make sure your pcv isnt clogged and clean your iacv using carb cleaner.
 

Rich-PMS

New Member
search.


i posted the most useful link that solves this problem
 


Prozon

Kris
rexpepper123 said:
oh snap really? hmm good thing to know! thank you
Click to expand...
Air pockets in the system cause issues with the IACV. You can still have idle issues if your coolant is topped off but not bled. :thumbs up
 


rexpepper123

Active Member
awesome im glad i learned that. i cleaned my icav and it helped alot. this was a while back only goes up/down a couple 100rpm now when its cold ill have to check my coolant. awesome when you learn something new everyday haha
 
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