i just replaced the iacv yesterday, before i replaced it the idle was all over the place sometimes it would be at 500ish rpms and and sometimes as high as 2200ish rpms. after replacement, it just stays around 1500 - 1800 rpms but not surging. i have the iacv screw almost all the way in, the throttle cable wheel screw is as far in as it will go and the throttle cable has slack so its not holding the TB open. i have checked for vacuum leaks and cant find anything. runs perfect other wise, any ideas? i have searched with no luck

 

try resetting the ECU... Take the Neg terminal off and press the brake for about 30-45 seconds.

 

ill try that but not likely, i had it unplugged for a good bit of time yesterday.

 

that IACV you replaced it with.... new or used? cause it sounds like you need to get your money back...

 

brand new, if i back out the idle screw the idle goes back up so it is working.

 

Coolant temp sensor? that can do all kinds of shit with a motor...

knock sensor? could be pulling time all over the place...

 

brand new temp sensor a week and a half ago, any way to test the knock sensor?

 

not too too sure.... chec the resistance.... usually if the sensor it's self is cracked it's a good bet it's shot out...

 

what about an o2 sensor going bad? could that be an issue?

 

Make sure the temp sensor is the right one, S13 and S14 are different.

If the knock sensor is bad it will throw a code.

Best to take it to have a consult done on it. If you are SURE its not a leak.