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1991 Ford Explorer XL 4.0L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on
This vehicle may have multiple problems. It runs great at times. for the most part though it runs realy bad. It runs real rich. to the point if your behind it on the road your eyes sting!! It has black smoke heavy out the tail pipe. It runs rough, surges, stal...
FIX posted 11/27/2000
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Related Documents & Media 
| VIN | 1FMDU34XYM |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / fuel injected |
| Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts Out, Stall, Misfire, Poor Fuel Economy, MIL Lamp On |
| Occurs | Hot, Intermittently |
Trouble Codes
| 12 | cannot raise rpm extended idle |
| 14 | profile ignition pickup irratic |
| 41 | ego not switching rich/lean |
| 56 | airflow maf/vaf signal high circuit open |
| 66 | airflow maf/vaf signal circuit ground |
| 96 | fuel pump circuit open battery to eca |
Message Closed w/FIX
Vehicle Data
1991 Ford Explorer XL
| VIN | 1FMDU34XYM |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / fuel injected |
| Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts Out, Stall, Misfire, Poor Fuel Economy, MIL Lamp On |
| Occurs | Hot, Intermittently |
Trouble Codes
| 12 | cannot raise rpm extended idle |
| 14 | profile ignition pickup irratic |
| 41 | ego not switching rich/lean |
| 56 | airflow maf/vaf signal high circuit open |
| 66 | airflow maf/vaf signal circuit ground |
| 96 | fuel pump circuit open battery to eca |
Video