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1998 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on
Engine looses power when supercharger boost comes in. Feels like loss of fuel. Both O2 sensors read the same. No misfire in cyllinders #2 and #6. #4 and #5 miss the worst. Runs perfect unless under load. New spark plugs, fuel filter, air filter. P0300, multipl...
FIX posted 4/2/2006
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Related Documents & Media | VIN | 1G2WP5216W |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Under Load, on Accel |
Trouble Codes
| P0300 | Multiple Misfire Detected |
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Vehicle Data
1998 Pontiac Grand Prix GTP
| VIN | 1G2WP5216W |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Under Load, on Accel |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Video