Car Problem Reports

Ford Expedition Check Engine Light due to worn spark plugs

Ford Expedition Problem
15 Reports
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Model Years Affected: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

Engines Affected: 4.6L V8, 5.4L V8

Average Mileage: 158,214 mi (117,000 mi - 205,000 mi)


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

  • Visitor, , 4.6L V8, 153,000 mi

    Rough idle and hesitation. Cleaned PCV and found a crack in the elbow that attaches to the trottle body. New hose and problem gone.

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  • Innkeeper, , 5.4L V8, 205,000 mi

    changing spark plugs - the old ones have over 100K on them

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  • Visitor, , 4.6L V8, 205,000 mi

    Changed spark plug

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  • Visitor, , 5.4L V8, 130,000 mi

    Code cylinder 8 & 4 misfire. Changed coil & spark plug on 8 & 4. Then code cylinder 7 * 3...changed...then code cylander changed all. Then code for crank shaft sensor...changed it. Now code for MAF Sensor.

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