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1991 Chevrolet K1500 Cheyenne 5.0L Poor Idle Quality, Surge
The idle will hunt and surge when the engine is first started then after it goes into closed loop the idle will settle down but the block learn will climb up to 160, all other scan data seems normal and IAC is around 23 the computer is compensating for a lean ...
FIX posted 8/14/1998
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Message Closed w/FIX
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Related Documents & Media 
| VIN | 2GCDK14H8M |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | OBDI |
| Symptoms | Poor Idle Quality, Surge |
| Occurs | Idle, Open Loop |
Message Closed w/FIX
Vehicle Data
1991 Chevrolet K1500 Cheyenne
| VIN | 2GCDK14H8M |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | OBDI |
| Symptoms | Poor Idle Quality, Surge |
| Occurs | Idle, Open Loop |
Video