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1990 Buick Riviera Luxury 3.8L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on
Vehicle came in with DTC 41, after studying wireing diag. I backprobed term J on the ignition module while KOER. it showed 10.3v and no square wave pattern I would expect to see from a Hall Switch. So I removed the cam sencor and found marks on it that loo...
FIX posted 12/6/1998
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| VIN | 1G4EZ13CXL |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SFI |
| Emissions | US FED |
| Symptoms | Poor Idle Quality, Poor Fuel Economy, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| 13 | O2 sencor curcuit |
| 41 | no cam sencor signal |
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Vehicle Data
1990 Buick Riviera Luxury
| VIN | 1G4EZ13CXL |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SFI |
| Emissions | US FED |
| Symptoms | Poor Idle Quality, Poor Fuel Economy, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| 13 | O2 sencor curcuit |
| 41 | no cam sencor signal |
Video