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1991 Mercury Sable GS 3.8L Misfire
help wanted from ford tech: hope you can help me on this one. customer's complaint of 'bucking' and engine light. i was unable to duplicate this. scanner showed rear o2 lean and not switching. i replaced both o2 sensor and sent him on his way. today he comes i...
FIX posted 10/20/1998
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| VIN | 1MECM5540M |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / efi |
| Symptoms | Misfire |
| Occurs | Intermittently |
Trouble Codes
| 172 | ego not switching lean exhaust bank 1 |
| 176 | ego not switching lean exhaust bank 2 |
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Vehicle Data
1991 Mercury Sable GS
| VIN | 1MECM5540M |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / efi |
| Symptoms | Misfire |
| Occurs | Intermittently |
Trouble Codes
| 172 | ego not switching lean exhaust bank 1 |
| 176 | ego not switching lean exhaust bank 2 |
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