I have not seen this exact issue discussed anywhere online and need to get this cleared up to pass emissions.
Here is what happens:
The idle speed is okay and does everything it should when driving and turning accessories on or off, and when testing. There are no vacuum leaks or intake leaks of any kind, no throttle body damage or fouling, no ground faults, and no gasket leaks.
The problem comes intermittently so it is hard to diagnose. Setting at idle while not driving the car will only for a short time act exactly as if I unplugged the IAC valve electrical connection and the idle jumps down and runs very rough as if it were about to stall. Right or soon after the P1506 code presents itself.
My first question would be, is this a symptom of a bad IAC valve, or a precursor to it going totally bad?
Second question, because it is hard to capture a reading without knowing when it will happen, could this mean a bigger issue with my electronics or PCM specifically?
Nothing I have done so far has recreated the idle problem itself or the code except unplugging he IAC valve connection.
have the same problem?
Sunday, October 30th, 2016 AT 11:55 AM