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2003 Hummer H2 6.0L Poor Idle Quality, Misfire, MIL Lamp on
car returned to shop again running poorly p0300 again tested left back pressure and found +4 psi figured this cat had alos failed replaced left cat still ran poorly checked right back pressure and found +10psi why are the cats going bad fuel trims are around +...
FIX posted 5/11/2006
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Related Documents & Media | VIN | 5GRGN23U93 |
| Engine | 6.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / sefi |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0300 | Multiple Misfire Detected |
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Vehicle Data
2003 Hummer H2
| VIN | 5GRGN23U93 |
| Engine | 6.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / sefi |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0300 | Multiple Misfire Detected |
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