High Idle but also sometimes stalls at idle
#12
PCM "learns" the IAC. If you change it, pull it out, or anything else of the nature, you need to reset the PCM, so it can re-learn where IAC is at zero. (same for TPS) It may not actually reflect 0 in the data.... but, the PCM always has a bit of built in fudge-factor.
I would try: Disconnect battery, let it sit for ten minutes. Reconnect battery. Turn ignition key to On, don't touch anything, count to ten. Start engine. See what it does.
I would try: Disconnect battery, let it sit for ten minutes. Reconnect battery. Turn ignition key to On, don't touch anything, count to ten. Start engine. See what it does.
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#15
This thread might help me with my problem. Like you mine has the long crank (fuel pump issue) however today i got the 1-200 rpm surge on the freeway. I had the high idle as well and cleaning the IAC helped but now I'm thinking i might have a vacuum problem or bad IAC. Would loose cruise control during surges. Is cruise vacuum driven on these? Gonna pull front o2 tomorrow to see if that does anything.
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#18
Sorry op if I'm jacking your thread, let me know if you want me to post else where. I figure since they are the same problem why not keep all the info here in one thread for future readers.
So I tested TPS and first verified my base line 5vdc reading was correct and it was. Then tested its function and got a reading of 3.9-4 vdc. So that should be considered functional correct? Or could tps still be bad possibly?
So I tested TPS and first verified my base line 5vdc reading was correct and it was. Then tested its function and got a reading of 3.9-4 vdc. So that should be considered functional correct? Or could tps still be bad possibly?
#19
#20
The test was not running but with ignition on. Read less than 1vdc and at full gas read 3.9vdc. However a tech at my work said that a meter won't detect a short or malfunction properly? So I don't know. Will most likely just start replacing sensors for good measure.