yeah more or less what the title says
i jus put in a new knock sensor (the old one had a big crack going through it-wich was crazy) anyway after i turned on the car my idle slowly climbed to 1500 but after i drive around for a bit the idle falls back to 700

even though my idle does fall back down when the car is driven around....everytime i turn on the car(cold or hot) the rpms climb.

anyone think of a reason why? I dont thiink it should have anything to do with the new KS but maybe it does and i dont know

Thanks

 

Give the ECU a few days to relearn everything. It should iron itself out.

 

check your throttle position sensor. it has a lot to do with rpm positions.

 

bump for anyone else's .2

 

Didyou reset the ECM and run the self-diagnosis after to see if the code cleared or if another reappeared?

 

no but im not home for another week or so......i'll have to check it when i get home.
but no check engine light ever came on, but i guess i'll have to wait and see

 

I believe it's called Fast-idle which is normal when you first start up your car.

 

Define "normal"?
the only reason i ask is because this has never happened