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1991 Pontiac Grand Am LE 2.3L Excessive Emissions, Poor Idle Quality
Posted to GM Driveability on 9/25/2006 6 Replies

engine runs rich, computer goes into closed loop and compensates causing a lean misfire. ect, fuel pressure (39+ psi), vacuum, compression (165+ psi) all normal, filters are clean. cylinder #1 plug consistently black. swapped #1 and #2 injectors and #1 plug st...

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Message Closed w/FIX

car Vehicle Data

1991 Pontiac Grand Am LE

VIN 1G2NE54D9M
Engine2.3 L / 4 cyl / GAS
Trans3-speed Automatic
DeliveryFI / MULTI-PORT
EmissionsOB1
SymptomsExcessive Emissions, Poor Idle Quality
OccursAlways, Hot, Idle
Message Closed w/FIX

car Vehicle Data

1991 Pontiac Grand Am LE

VIN 1G2NE54D9M
Engine2.3 L / 4 cyl / GAS
Trans3-speed Automatic
DeliveryFI / MULTI-PORT
EmissionsOB1
SymptomsExcessive Emissions, Poor Idle Quality
OccursAlways, Hot, Idle