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1987 Chevrolet R20 Suburban Custom Deluxe 7.4L Poor Idle Quality
Customer came into shop with a high idle problem. Started with tech 1 scan engine no stored codes, all readings look good except for IAC counts about 70-75. Checked for vacuum leaks, none found. Checked min air rate because plug was missing from TBI and tp...
FIX posted 11/19/1999
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| VIN | 1GNGR26N6H |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / TBI |
| Symptoms | Poor Idle Quality |
| Occurs | Hot, Intermittently |
Message Closed w/FIX
Vehicle Data
1987 Chevrolet R20 Suburban Custom Deluxe
| VIN | 1GNGR26N6H |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / TBI |
| Symptoms | Poor Idle Quality |
| Occurs | Hot, Intermittently |
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