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1991 Chevrolet R1500 Suburban Scottsdale 5.7L High Idle RPM
ECM is using IAC to keep idle at 1000rpm. IAC reads bout 60 when in park/N. Shift to drive rpm drops to 600 and IAC # goes up til it gets to 145 trying to raise rpm. It can't get to 1k while my foot on brake but it does try. Back to park rpm is 1500 til IAC ba...
FIX posted 4/17/2001
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| VIN | 1GBER16K2M |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | US/HIGH ALT |
| Symptoms | High Idle RPM |
| Occurs | Always, Idle |
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Vehicle Data
1991 Chevrolet R1500 Suburban Scottsdale
| VIN | 1GBER16K2M |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / TBI |
| Emissions | US/HIGH ALT |
| Symptoms | High Idle RPM |
| Occurs | Always, Idle |
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