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International Automotive Technicians Network
1991 Buick Park Avenue 3.8L Excessive Emissions
Posted to GM Driveability on 6/17/2010 14 Replies

Ran about 6 pre-test on the machine and results all the same except NoX on first run which was 1800 PPM. Fixed small air leak and replaced ECT after test showed it was out of specs and NoX was reduced to 870 PPM. Also notice rust in coolant passage after ECT w...

14 Replies Received (View Replies)

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car Vehicle Data

1991 Buick Park Avenue

VIN 1G4CU53L5M
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD 1, Ca Emission
SymptomsExcessive Emissions
OccursAlways
Message Closed

car Vehicle Data

1991 Buick Park Avenue

VIN 1G4CU53L5M
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD 1, Ca Emission
SymptomsExcessive Emissions
OccursAlways