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2003 Pontiac Montana 3.4L Poor Idle Quality, High Idle
Posted to GM Driveability on 5/13/2014 34 Replies

Can not figure this one out. Idles high [...]. Can get to idle down 900. As soon as it goes into gear idle jumps up again. Replaced IAC, Replaced bad PCV hose on throttle body, cleaned MASS Air Flow. Replaced IAC With different vendor. IAC reads correct. Just ...

34 Replies Received (View Replies)

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Message Closed w/FIX

car Vehicle Data

2003 Pontiac Montana

VIN 1GMDX03E63
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / MPI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, High Idle
OccursAlways
Message Closed w/FIX

car Vehicle Data

2003 Pontiac Montana

VIN 1GMDX03E63
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / MPI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, High Idle
OccursAlways