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1993 Chevrolet Commercial Chassis 5.7L Poor Idle Quality, Surge, Esp cold
Posting for another GM tech. Car always hunts for idle on restart, especially cold but also hot. Longterm fuel trim resets on every restart to 128. Keep alive power 10.78 on restart. Grounds also checked for voltdrops. Have checked and scoped all circuits. O2 ...
FIX posted 6/11/1998
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| VIN | 1G1BL5373P |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | OBD1 |
| Symptoms | Poor Idle Quality, Surge, Esp Cold |
| Occurs | Cold, Hot, After Restart |
| Misc. | Police Car |
Message Closed w/FIX
Vehicle Data
1993 Chevrolet Commercial Chassis
| VIN | 1G1BL5373P |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | OBD1 |
| Symptoms | Poor Idle Quality, Surge, Esp Cold |
| Occurs | Cold, Hot, After Restart |
| Misc. | Police Car |
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