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1999 Chevrolet C3500 7.4L Misfire
Misfire under load above 4000 rpm when in passing gear or hard acceleration like on freeway ramp. Did tuneup with wires and distributor cap from Chevy dealer. Misses on #4 and #5 more on 4. Fuel pressure and volume good and there are cylinders with no misfires...
FIX posted 10/3/2015
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Related Documents & Media | VIN | 1GBJC34J1X |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Port |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Under Load, Above 4000 RPM |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Message Closed
Vehicle Data
1999 Chevrolet C3500
| VIN | 1GBJC34J1X |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Port |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Under Load, Above 4000 RPM |
Trouble Codes
| P0300 | Multiple Misfire Detected |
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