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1989 GMC V3500 7.4L High Idle
If you start vehicle and let sit and idle everything is ok, runs normal. Put vehicle in drive or reverse and the iac goe to full open 140-145. It takes a few seconds to climb to full open. this action puts the idle at 1700 rpm when put back into park. some tim...
FIX posted 5/24/2008
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Related Documents & Media | VIN | 1GTHV33N7K |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / tbi |
| Emissions | us fed |
| Symptoms | High Idle |
| Occurs | Under Load, Put in Gear |
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Vehicle Data
1989 GMC V3500
| VIN | 1GTHV33N7K |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / tbi |
| Emissions | us fed |
| Symptoms | High Idle |
| Occurs | Under Load, Put in Gear |
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