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1993 Mercury Grand Marquis GS 4.6L MIL Lamp on
Pulling hairs on this one. Car can in with CEL on. Found 327 and 337. Voltage at PFE sensor was 3.2 vdc @ idle and didnt vary much throught the throttle range. I tested for good vacuum to EGR solenoid. Vacuum passed when soleniod was grounded, but I got no cha...
FIX posted 2/8/2001
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Message Closed w/FIX
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| VIN | 2MELM75WOP |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Symptoms | MIL Lamp On |
| Occurs | After Extended Drives |
Trouble Codes
| 323 | PFE sensor voltage too low |
| 327 | PFE sensor too high |
Message Closed w/FIX
Vehicle Data
1993 Mercury Grand Marquis GS
| VIN | 2MELM75WOP |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Symptoms | MIL Lamp On |
| Occurs | After Extended Drives |
Trouble Codes
| 323 | PFE sensor voltage too low |
| 327 | PFE sensor too high |
Video