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1999 Pontiac Montana 3.4L Poor Idle Quality
Posted to GM Driveability on 8/27/2004 7 Replies

has intermitant high idle (1300 to 1600 rpms) there are no codes and the TPS voltage is .48 moving a little to .46 but the TPS % is anywhere from .3% to 5.0% semes like idle will be high when at 5.0% if I turn key off and on it will come down to 3.1% and off a...

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Message Closed w/FIX

car Vehicle Data

1999 Pontiac Montana

VIN 1GMDX03E4X
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursIntermittently
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Montana

VIN 1GMDX03E4X
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursIntermittently