jumpy idle
#1
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jumpy idle
Ever since i swapped out my stock head for one with work done, pnp, valve job, milled .030", stg 2 cams, dual valve springs, ti retainers, adj cam gears, arp head studs, new valve seals, new head gasket, my idle has been messed up. I shouldn't actually say idle b/c it doesn't really idle.
When the car is at normal operating temperature the engine will rev up to 1200-1500rpm and bog down to 2,3,4,500rpm usually. It doesn't usually stall out, unless i have driven on the highway for 20-30 minutes. So after highway driving i have to adjust the idle screw just so it doesn't stall when i come to a stop before i can give it that ever-so-slight amount of gas so it doesn't stall.
I have a vafc and the sensor check says TPS is 4.45V @ closed throttle. I've reset and adjusted the TPS after i put on a 64mm bored b16 t/b with a new FITV (so the FITV is out of the question) But when i come to a stop and give it that "ever-so-slight" amount of gas the throttle reading on the vafc is 0.0 but clearly i am giving it gas b/c it steadies out the idle.
I pulled the IACV off and there was no build up on the screen. But can the IACV still be malfunctioning? I have replaced the PCV as well. Today i got out the old vacuum pressure guage. It jumped between 12-15 inches of vacuum at idle.
Any help is appreciated.
When the car is at normal operating temperature the engine will rev up to 1200-1500rpm and bog down to 2,3,4,500rpm usually. It doesn't usually stall out, unless i have driven on the highway for 20-30 minutes. So after highway driving i have to adjust the idle screw just so it doesn't stall when i come to a stop before i can give it that ever-so-slight amount of gas so it doesn't stall.
I have a vafc and the sensor check says TPS is 4.45V @ closed throttle. I've reset and adjusted the TPS after i put on a 64mm bored b16 t/b with a new FITV (so the FITV is out of the question) But when i come to a stop and give it that "ever-so-slight" amount of gas the throttle reading on the vafc is 0.0 but clearly i am giving it gas b/c it steadies out the idle.
I pulled the IACV off and there was no build up on the screen. But can the IACV still be malfunctioning? I have replaced the PCV as well. Today i got out the old vacuum pressure guage. It jumped between 12-15 inches of vacuum at idle.
Any help is appreciated.
#5
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Well i have no CEL but i decided to check to see if it was throwing any codes. Sure enough code 41 Primary o2 sensor heater. So i replaced the o2, reset the ecu and checked for the code and it was still there. But still no CEL WTF?
#8
unstable idle
hi i have the same problem the engin wil rev up all buy itself at idle sit there at the light and people think im doing it 2 race or just because i have a noisy mufler so i pulled out my intake temp senswor and its just dangeling in the engin compartment but now it never revs up any more idles perfect
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