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1990 Cadillac DeVille 4.5L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy
initially checked manifold vacuum and it was at 16in hg and steady at idle, then checked o2 sensor voltage and it was at .865v or higher at all engine speeds(slightly higher as rpm went up and also slightly higher the longer I held rpm steady). Decided to repl...
FIX posted 10/17/2005
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Related Documents & Media | VIN | 1G6CD5332L |
| Engine | 4.5 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / pfi |
| Emissions | obd1 ca emissions |
| Symptoms | Excessive Emissions, Poor Idle Quality, Poor Fuel Economy |
| Occurs | Always |
Trouble Codes
| E49 | air pump malfunction |
Message Closed w/FIX
Vehicle Data
1990 Cadillac DeVille
| VIN | 1G6CD5332L |
| Engine | 4.5 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / pfi |
| Emissions | obd1 ca emissions |
| Symptoms | Excessive Emissions, Poor Idle Quality, Poor Fuel Economy |
| Occurs | Always |
Trouble Codes
| E49 | air pump malfunction |
Video