Ford Expedition Problem Report

Ford Expedition Check Engine Light due to worn spark plugs

(15 reports)

An illuminated Check Engine Light may indicate that the spark plugs are worn; this will cause intermittent misfire and damage to the coil packs.

Rough idle and hesitation. Cleaned PCV and found a crack in the elbow that attaches to the trottle body. New hose and problem gone. -
changing spark plugs - the old ones have over 100K on them -
Changed spark plug -
Code cylinder 8 & 4 misfire. Changed coil & spark plug on 8 & 4. Then code cylinder 7 * 3...changed...then code cylander 1...so changed all. Then code for crank shaft sensor...changed it. Now code for MAF Sensor. -
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