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1991 Cadillac DeVille 4.9L Excessive Emissions
A '91 Sedan DeVille 4.9 failed an Illinois emissions test. I used an OTC 4 gas and a Snap-on Mt 2500 scanner to get a baseline of gas readings and sensor values. I noticed the O2 sensor voltage was low and switching was very slow. I replaced the O2. O2 voltage...
Summary posted 10/3/2003
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Related Documents & Media | VIN | 1G6CD53B5M |
| Engine | 4.9 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / Port Injection |
| Emissions | OBD 1 |
| Symptoms | Excessive Emissions |
| Occurs | Intermittently |
| Misc. | Sedan |
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Vehicle Data
1991 Cadillac DeVille
| VIN | 1G6CD53B5M |
| Engine | 4.9 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / Port Injection |
| Emissions | OBD 1 |
| Symptoms | Excessive Emissions |
| Occurs | Intermittently |
| Misc. | Sedan |
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