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2003 GMC Sierra 1500 SLE 5.3L Poor Idle Quality, Misfire, MIL Lamp on, Low Power
Truck came in with owner complaining of low power & missfire. Checked for codes, Found Maf code & P0300. Cleared codes & only P0300 returns. Missfire counter shows 2,4,6,8 Missfiring. Feul press 55psi. Spark on all cylanders ok. Test injector signal on affecte...
FIX posted 10/3/2006
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Message Closed w/FIX
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16 Replies Received
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Related Documents & Media | VIN | 2GTEK19T63 |
| Engine | 5.3 L / 8 cyl / FLEX |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp on, Low Power |
| Occurs | Always, Under Load, Idle |
Trouble Codes
| P0101 | Mass Airflow Sensor Range/Performance |
| P0300 | Multiple Misfire Detected |
Message Closed w/FIX
Vehicle Data
2003 GMC Sierra 1500 SLE
| VIN | 2GTEK19T63 |
| Engine | 5.3 L / 8 cyl / FLEX |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp on, Low Power |
| Occurs | Always, Under Load, Idle |
Trouble Codes
| P0101 | Mass Airflow Sensor Range/Performance |
| P0300 | Multiple Misfire Detected |
Video