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1991 Cadillac DeVille 4.9L Poor Idle Quality
idles and runs normal with ac off. turn it on and idle gets rough, spark knock occurrs, hesitation, miss under load. turn ac off, problem goes away. have cleaned throttle & egr & passages, replaced egr solenoid. still works the same. almost like ac relay is sh...
FIX posted 7/19/2001
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Message Closed w/FIX
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| VIN | 1F6CD53B1M |
| Engine | 4.9 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | US |
| Symptoms | Poor Idle Quality |
Message Closed w/FIX
Vehicle Data
1991 Cadillac DeVille
| VIN | 1F6CD53B1M |
| Engine | 4.9 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | US |
| Symptoms | Poor Idle Quality |
15 Replies Received
15 Replies Received
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