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1991 GMC C1500 Sierra SLE 4.3L Excessive Emissions, Poor Idle Quality
This started running so rich,it spit black smoke like a diesel. I checked MAP, EGR, CTS and all looked good. scoped engine and found no defects. Scoped injectors and found it was turning on the injectors at random instead of alternating firing them. Replaced E...
FIX posted 12/16/2001
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Related Documents & Media | VIN | 1GTDC14Z3M |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | Federal |
| Symptoms | Excessive Emissions, Poor Idle Quality |
| Occurs | Always |
Message Closed w/FIX
Vehicle Data
1991 GMC C1500 Sierra SLE
| VIN | 1GTDC14Z3M |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | Federal |
| Symptoms | Excessive Emissions, Poor Idle Quality |
| Occurs | Always |
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