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1999 Pontiac Grand Am SE 3.4L Misfire, MIL Lamp on
Hope we can get some help. I'm helping a friend at his garage. this gran am is giving us fits. shows mis fire on # 4 cylinder only, will not show a code for#4 just po300. what has been done so far, compression 150, replace spark plug and wire, swapped injector...
FIX posted 8/30/2011
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Related Documents & Media | VIN | 1G2NE52E3X |
| Engine | 3.4 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Always, Under Load, on Accel, Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Message Closed w/FIX
Vehicle Data
1999 Pontiac Grand Am SE
| VIN | 1G2NE52E3X |
| Engine | 3.4 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Always, Under Load, on Accel, Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Video