Quote:
Originally Posted by Om1kron
most of the time the bypass valve that's in the aac gets stuck, this is either from the aac just being old or the electronics in it finally died. I've had this problem on my car since the timing was fixed. When my timing was off car was idling where it was supposed to.
Once I finally dyno'ed the car the IACV has taken a shit.
try running the car and unplugging the IAVC from the harness adjust the screw on it until it's idling at 1200 disconnected.
turn the car off and plug it back in, turn the car back on. If the idle doesn't fall to 8-900 and goes up to 1900-2000 rpms then the IACV is bad. (PERIOD)
Everyone on zilvia will tell you to adjust all of this unecessary shit, don't you'll make it worse. If the car ran fine and one day decided to run all retarded, this is 100 percent the problem.
I've been troubleshooting this for the past 2 months now trying to get to the bottom of it, and short of testing a new IAVC it's still not resolved. I am willing to bet 100 dollars that when I put a new IACV on my car and fire it up and adjust it, the problem will be resolved.
I did see an article somewhere on how to rebuild one but I cannot find it for the life of me otherwise I would give that a try.
You have to keep in mind how old your motor is and how old this piece of electronics is.
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I noticed this is an old thread but I am having the exact same problem. I'm gonna give this method a shot before replacing the AICV... I thought it might have been an ecu issue since I went auto to 5spd and only have the speed sensor hooked up on lower harness... Off topic but, another major problem I need to fix is my heater core flap door adjustment! This is gonna be a pain to get to but I'm hoping it'll fix my temp control switch issue. anyways thx for the input. We'll see how it goes.