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2003 Chevrolet Silverado 1500 5.3L Misfire
Posted to GM Driveability on 4/20/2015 45 Replies

I am posting this to help a friend at another shop. He has a 03 Chevrolet 5.3 that is missing out on cylinders 2 and 7 at idle. Anything above 990 rpm and it is running fine. After replacing the intake gasket and clearing the codes, the only code now is P0300....

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  Related Documents & Media  2003 Chevrolet Silverado 1500

 
Message Closed w/Summary

car Vehicle Data

2003 Chevrolet Silverado 1500

VIN 2GCEK19T03
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIdle

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected
P0443EVAP Canister Purge Valve Circuit Malfunction
P2108Throttle Actuator Control Module Malfunction
Message Closed w/Summary

car Vehicle Data

2003 Chevrolet Silverado 1500

VIN 2GCEK19T03
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIdle

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected
P0443EVAP Canister Purge Valve Circuit Malfunction
P2108Throttle Actuator Control Module Malfunction