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1988 Chevrolet C3500 Cheyenne 7.4L Excessive Emissions, Misfire
hi all, this thing will run fine then all of a sudden go full rich, just pouring black smoke out of tailpipe, fuel pressure stays at 14, checked map, coolant, o2 and tps all are functioning [...] for loss of rpm signal to ecm, all checks ok, performed voltage ...
FIX posted 12/21/2000
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Message Closed w/FIX
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| VIN | 2GCHC39N9J |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / tbi |
| Emissions | ca |
| Symptoms | Excessive Emissions, Misfire |
| Occurs | Cold, Intermittently |
| Misc. | Dually |
Message Closed w/FIX
Vehicle Data
1988 Chevrolet C3500 Cheyenne
| VIN | 2GCHC39N9J |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / tbi |
| Emissions | ca |
| Symptoms | Excessive Emissions, Misfire |
| Occurs | Cold, Intermittently |
| Misc. | Dually |
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