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1988 GMC C3500 Sierra SLE 7.4L Poor Idle Quality
I am having problems with the idle on this truck. when idling in park, the truck idles good. 750 RPM, IAC counts around 30. When put in drive for two or more minutes, the IAC counts start to rise to 90 or higher to keep the engine idling around 750. When put b...
FIX posted 10/16/2000
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| VIN | 2GTGC39N9J |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
| Misc. | T.b. Injection |
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Vehicle Data
1988 GMC C3500 Sierra SLE
| VIN | 2GTGC39N9J |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
| Misc. | T.b. Injection |
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