1999 Ford Expedition Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Ford Expedition
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1999 Ford Expedition ProblemsCheck Engine Light Due to Failed MAF Sensor
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.
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 PCV hose may crack, causing the vehicle to idle roughly, this may or may not illuminate the Check Engine Light.