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1991 Cadillac DeVille 4.9L Excessive Emissions, HIGH NOX
Posted to GM Driveability on 12/16/2002 8 Replies

THE ABOVE EMISSIONS ARE THE RESULTS OF AN ASM TEST IDLE= 15MPH CRUISE=25MPH RESULTS

HELP. I HAVE THIS CADILLAC WITH HIGH NOX. I HAVE TESTED AND REPLACED SEVERAL COMPONENTS. IN THE BEGINING BEFORE ANITHING WAS DONE TO IT THE NOX WAS APROX. 1700 PPM (IT NEEDS T...

8 Replies Received (View Replies)

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car Vehicle Data

1991 Cadillac DeVille

VIN 1G6CD53B9M
Engine4.9 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / PFI
EmissionsCA EMISSIONS OBDI
SymptomsExcessive Emissions, High NOx
OccursAlways
Message Closed w/FIX

car Vehicle Data

1991 Cadillac DeVille

VIN 1G6CD53B9M
Engine4.9 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / PFI
EmissionsCA EMISSIONS OBDI
SymptomsExcessive Emissions, High NOx
OccursAlways