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 ProblemsRough Idle Caused By EGR Sensor Sticking
Intermittent rough idle may be caused by the EGR sensor sticking, causing the EGR valve to stay slightly open. Our technicians tell us the valve and sensor must be replaced together to correct this concern.
The mass air flow sensor (MAF) may fail resulting in a rough engine idle, hesitation on acceleration, and/or engine stalling. The Check Engine Light may or may not illuminate. A failed mass air flow sensor will require replacement.
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.
2004 Ford Expedition QuestionsWhere is the GEM located? (1 answer)
I'm convinced that all of the crazy electrical things that have occurred (starter catching on fire, one headlamp not working, power windows intermittently not working, volume control changing the radio station, power seat intermittently not working) are due to a "wet" GEM. Been deal...
Been reading blogs that suggest withering harness. Others mention they have changed both the battery and altenator and had no resolution.