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1991 Chevrolet C2500 Cheyenne 7.4L MIL Lamp on
Hi fellow techs we inherited this problem from another shop The engine runs perfect until the check engine light comes on then the idle speeds up to 1,100 R.P.M.,scan for CODES none [...] Propane system has a LPG SPARK TIMING RECURVE COMPUTOR by AUTOTRONICS CO...
FIX posted 11/3/2000
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Message Closed w/FIX
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| VIN | 2GCGC29N2M |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / PROPANE |
| Emissions | US FEDERAL EMISSIONS |
| Symptoms | MIL Lamp On |
| Occurs | After a Hot Soak |
| Misc. | Propane Fuel Only |
Message Closed w/FIX
Vehicle Data
1991 Chevrolet C2500 Cheyenne
| VIN | 2GCGC29N2M |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / PROPANE |
| Emissions | US FEDERAL EMISSIONS |
| Symptoms | MIL Lamp On |
| Occurs | After a Hot Soak |
| Misc. | Propane Fuel Only |
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