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1991 Cadillac DeVille 4.9L Excessive Emissions
Posted to GM Driveability on 10/17/2013 10 Replies

Car has only 53K miles very clean well maintain. The CO is at 0.00% running lean causing high NOX. Fuel filter is new. no leaks from pressure regulator or any air / vacuum leaks. EGR works per specs and no restriction at passages. Cat Converter is not faulty. ...

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  Related Documents & Media  1991 Cadillac DeVille

 
Message Closed w/Summary

car Vehicle Data

1991 Cadillac DeVille

VIN 1G6CD53B2M
Engine4.9 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / TBI
EmissionsCA.
SymptomsExcessive Emissions
OccursAlways
Message Closed w/Summary

car Vehicle Data

1991 Cadillac DeVille

VIN 1G6CD53B2M
Engine4.9 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / TBI
EmissionsCA.
SymptomsExcessive Emissions
OccursAlways