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2004 Ford Excursion XLS 5.4L Misfire
Posted to Ford Driveability on 2/12/2018 9 Replies

Did a tune up with motorcraft plugs and replaced the intake manifold due to coolant leak. the spark plug electrode was melted. Anything I should check for. I see it to be a common problem but couldn't find any causes expect for helicoil issues.

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car Vehicle Data

2004 Ford Excursion XLS

VIN 1FMNU41L74
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
Misc.Reman Engine at 200K

Trouble Codes

P0305Cylinder 5 Misfire Detected
Message Closed

car Vehicle Data

2004 Ford Excursion XLS

VIN 1FMNU41L74
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
Misc.Reman Engine at 200K

Trouble Codes

P0305Cylinder 5 Misfire Detected