I have a 2002 pontiac sunfire problem where the idle RPM Surges up and down when the A/C is engaged. It also sounds like the A/C clutch is cycling. I had the entire A/C System checked and it is fine. A/C blows very cold, no problems. It also seems to make a difference if you are in Park or if you are in Drive.
The mechanic who checked the A/C system could not find anything wrong with the electrical components or the A/C parts and blamed the problem on a defective PCM computer - Car was returned to me unrepaired.
I found other posts here that reported similar problems with sunfire and the best answers for a fix seemed to point to a dirty IAC sensor. They recommened taking it out and cleaning it, then replacing it.
My question is - Can you tell me where the Idle Air Control (IAC) valve/sensor is?
Also if you have another solution I would appreciate any suggestions.
Thank you.
Bruce
The mechanic who checked the A/C system could not find anything wrong with the electrical components or the A/C parts and blamed the problem on a defective PCM computer - Car was returned to me unrepaired.
I found other posts here that reported similar problems with sunfire and the best answers for a fix seemed to point to a dirty IAC sensor. They recommened taking it out and cleaning it, then replacing it.
My question is - Can you tell me where the Idle Air Control (IAC) valve/sensor is?
Also if you have another solution I would appreciate any suggestions.
Thank you.
Bruce
Apr 8, 2009 at 10:47 AM