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2004 Ford F-150 FX4 5.4L Misfire, Poor Fuel Economy, MIL Lamp on
tHIS IS AN INTERMITENT PROBLEM. IT MISFIRES UP A STEEP HILL AT 35 TO 55 MPH. IT DOESN'T OCCUR ALL THE TIME, BUT ALOT. THE ENGINE RUNS VERY WELL OTHERWISE. I HAVE CHANGED THE #3 PLUG AND COIL. I HAVE ALSO REPLACED #2 COIL INTHE PAST FOR MISFIRE. FUEL TRIMS IN F...
FIX posted 1/20/2010
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Related Documents & Media | VIN | 1FTPW14554 |
| Engine | 5.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, Poor Fuel Economy, MIL Lamp On |
| Occurs | Under Load, on Accel |
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected |
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Vehicle Data
2004 Ford F-150 FX4
| VIN | 1FTPW14554 |
| Engine | 5.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, Poor Fuel Economy, MIL Lamp On |
| Occurs | Under Load, on Accel |
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected |
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