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1990 GMC C1500 Sierra SLE 5.7L Misfire
Hello. This truck misfires when throttle is just barely open when cruising. Disconnecting the egr valve vacuum hose gets rid of the miss. Hooked up a vacuum gauge to the hose at the egr valve and noted full (15-20 ") vacuum when throttle is just barely open at...
FIX posted 11/14/2002
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Message Closed w/FIX
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6 Replies Received
Related Documents & Media | VIN | 1GTDC14K2L |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / tbi |
| Emissions | ca |
| Symptoms | Misfire |
| Occurs | Cruise |
Message Closed w/FIX
Vehicle Data
1990 GMC C1500 Sierra SLE
| VIN | 1GTDC14K2L |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / tbi |
| Emissions | ca |
| Symptoms | Misfire |
| Occurs | Cruise |
Video