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1997 Cadillac DeVille 4.6L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 4/19/2004 6 Replies

This car was bought at an auction by the customer. It came in with P0300 and P1376. I cleared the codes and P0302 almost immediately came back. I swapped plugs between 2 & 4 with no change. I swapped wires also between 2 & 4 with no change. An injector drop te...

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Message Closed w/Summary

car Vehicle Data

1997 Cadillac DeVille

VIN 1G6KD54Y7V
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Cold, Hot, Under Load, on Decel, on Accel, Cruise, Idle

Trouble Codes

P0300Multiple Misfire Detected
P0302Cylinder 2 Misfire Detected
P1376IC Module Ignition Ground Circuit Malfunction
Message Closed w/Summary

car Vehicle Data

1997 Cadillac DeVille

VIN 1G6KD54Y7V
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Cold, Hot, Under Load, on Decel, on Accel, Cruise, Idle

Trouble Codes

P0300Multiple Misfire Detected
P0302Cylinder 2 Misfire Detected
P1376IC Module Ignition Ground Circuit Malfunction