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1999 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on
Posted to GM Driveability on 3/10/2003 19 Replies

Help GM guys this truck has a miss when under a slight to heavy load. po300 is the only code in the system.

I can watch the missfire counter and #3 CYLINDER SEEMS TO BE THE ONE MISSFIRING.

The fuel trim is at 13 bank 2 & 17 bank 1.

I have swaped coils(these...

19 Replies Received (View Replies)

  Related Documents & Media  1999 Chevrolet Silverado 1500

 
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet Silverado 1500

VIN 1GCEC14T5X
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursUnder Load

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet Silverado 1500

VIN 1GCEC14T5X
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursUnder Load

Trouble Codes

P0300Multiple Misfire Detected