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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Vehicle Data1999 Chevrolet C3500
Trouble Codes
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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 |