Originally posted by fdunford:
Originally posted by emartinez13:
Originally posted by Paul Kienitz:
For me, if the idle started surging up and down, it was always just a dirty MAF symptom. Good to know there is another thing that can cause it.



I wish that's all it was, would be a cheap fix. I have cleaned it and it didn't do anything. Anyways...here's an update to replacing the IAC. Took me about 30 minutes to get the old one off and put the new one on. Unfortunately, that didn't fix my problem Anyone have any other suggestions? I have cleaned maf, replaced pcv valve, cleaned throttle body, replaced egr valve, replaced dpfe, checked idle increase solenoid (was good), the air filter is still clean. What am I missing? Maybe a new PCM



I'd suggest checking the TPS sensor. It's just a 3 wire pot.



Well, I tried to test the TPS but I couldn't since it's so close to the firewall, couldn't get my hands behind it nor could I see the terminals to make sure i'm testing the correct ones. Any suggestions? Other than taking it off the throttle body?

95 Gl Zetec Atx