2004 Ford Expedition Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Ford Expedition
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2004 Ford Expedition ProblemsTSB For Possible Ejection of Spark Plug From Cylinder Head
There is a technical service bulletin for the V8 engines regarding a possible problem with the spark plug being ejected from the cylinder head, damaging the threads in the spark plug hole. If the vehicle is under warranty, cylinder head replacement is recommended. If the vehicle is out of warranty, Ford authorized the use of a specific thread insert to repair the head.
An illuminated Check Engine Light could indicate that one or more of the ignition coils has failed due to excessive spark plug gap. To fix this problem, the ignition coils that have failed, the spark plugs, and all coil boots should be replaced.
The PCV hose may crack, causing the vehicle to idle roughly, this may or may not illuminate the Check Engine Light.
2004 Ford Expedition Questions"Charging Sustem Error" flickers on the dashboard. Any thoughts of my issues? (1 answer)
Been reading blogs that suggest withering harness. Others mention they have changed both the battery and altenator and had no resolution.