hey guys

right ive had this problem with my Idle control valve since i built the turbo B in my dc2 ITR.

basicly what happens is the idle control valve appears to work fine for a while and then it starts to play up.. sometimes the idle sticks quite high at around 1500-2000rpm sometimes higher, sometimes doesnt work at all (more often than not it stops working completly)

anyways we checked everything we could think of even changing the idle control valve 4 times with ones known to be working properly.

the car is running on ectune, and when the idle control valve starts to play up, it is un responsive to adjustment on the laptop (when its working correctly you adjust the idle up or down on the laptop and the rpm will obviously respond to the adjustment, however when trying to adjust the idle through ectune once the idle control valve starts to play up, it does not respond at all..) however if you replace the idle control valve with another it starts to respond again, but it doesnt last and ends up like before.

idle control valve
checked voltage and wiring to idle control valve from ecu
changed ecu

have reached a dead end as to what to check next so we ended up disconnecting the idle control valve and setting the idle by the TB but its not the best way to do it on a daily driver as it will only idle once fully warmed so cold starts every morning are a real pain.. just wondering if anyone has had this problem before..?

thanks - dan

 

have you tried checking continuity between a9 and the iacv? i was having trouble with mine and ended up running a new signal wire to a9. voltage was checking out just fine but there must have been a broken wire in the harness somewhere. (car would idle high at cold start, idle hunt until warm, stall when slowing to a stop and eventually would not idle at all)