1995 P30 ECM Faults (454 TBI)
My MH has been constantly idling way too high whether it is hot, cold, etc. I checked the ECM codes and below is what I found: 32 - egr circuit (fuel-injected models); DTC - 32 EGR system failure 3...
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Finally got around to working on this and the problem turned out to be the butterfly valve being held slightly open by the cruise control cable; not sure how the cable shrunk. I also removed the IAC and cleaned the pintle (it looked very good) and pintle seat. Also removed the EGR and it looked very good as well. All of the fault codes cleared within a few minutes after starting the engine. It properly idled up cold and then dropped after warming up. It now idles at 800RPM, which I believe is still a little high; spec is 625 +/-25 RPM? I will check for vacuum leaks. I bought a new throttle body gasket just in-case and suspect that is most likely issue. I did pass SMOG yesterday! Also just discovered an exhaust leak; hopefully just a flange gasket. I believe by 1995 GM corrected the "cracking/warping manifold" problems?
