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1994 Cadillac DeVille 4.9L Excessive Emissions
Posted to GM Driveability on 10/16/2003 3 Replies

NOX is high, failed emmission test - tested EGR - engine stumble when full vacuum is applied - battery voltage is present with engine running. PCM is grounding the circuit preventing EGR operation. We have removed wiring from PCM and found that circuit 435 (EG...

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Message Closed w/FIX

car Vehicle Data

1994 Cadillac DeVille

VIN 1G6KD52B2R
Engine4.9 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SFI
EmissionsUS FEDERAL
SymptomsExcessive Emissions
OccursAlways
Message Closed w/FIX

car Vehicle Data

1994 Cadillac DeVille

VIN 1G6KD52B2R
Engine4.9 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SFI
EmissionsUS FEDERAL
SymptomsExcessive Emissions
OccursAlways