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1999 Pontiac Grand Prix GT 3.8L Misfire, MIL Lamp on
This car misfires on cyl's 2 & 5 (comes & goes) that starts @ 52mph or higher under steady throttle, I can watch the misfires on my scanner as well as feel it. It never misfires any other time. Previous shop replaced spark plugs, wires, coil (2 & 5 share coil)...
FIX posted 11/13/2014
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Message Closed w/FIX
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34 Replies Received
34 Replies Received
Related Documents & Media | VIN | 1G2WP52K2X |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Cruise |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Message Closed w/FIX
Vehicle Data
1999 Pontiac Grand Prix GT
| VIN | 1G2WP52K2X |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Cruise |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Video