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2001 GMC C-Series Topkick C7H042 8.1L Misfire
this truck has a misfire on cyl #7, worse when hot. it has spark,good fuel pressure, good [...] coils to different cylinders and plugs. changed intake gasket. pulling hair out. no codes.
FIX posted 8/19/2009
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11 Replies Received
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| VIN | 1GDJ7H1E31 |
| Engine | 8.1 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / port fuel |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Always |
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Vehicle Data
2001 GMC C-Series Topkick C7H042
| VIN | 1GDJ7H1E31 |
| Engine | 8.1 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / port fuel |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Always |
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