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1999 GMC Sierra 1500 SL 5.3L Misfire
Fuel pressure is 56psi. Misfiring on cylinder 4 most of the time and sometimes on cylinder 6. Replaced coils and injectors. Injectors are noiding. Compression is 150 psi. Need help if anyone has any ideas, it would be greatly appreciated.
FIX posted 3/29/2012
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Related Documents & Media | VIN | 2GTEK19T9X |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Always |
Trouble Codes
| P0157 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage |
| P0300 | Multiple Misfire Detected |
| P0332 | Knock Sensor Rear Circuit Low Voltage |
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Vehicle Data
1999 GMC Sierra 1500 SL
| VIN | 2GTEK19T9X |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Always |
Trouble Codes
| P0157 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage |
| P0300 | Multiple Misfire Detected |
| P0332 | Knock Sensor Rear Circuit Low Voltage |
Video