Car Problem Reports

Ford Expedition Ignition Coil Failure Due to Excessive Spark Plug Gap

Ford Expedition Problem
46 Reports
Me Too

Model Years Affected: 1997, 1998, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

Engines Affected: 4.6L V8, 5.4L V8

Average Mileage: 131,083 mi (48,000 mi - 200,000 mi)


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.

  • Visitor, , 95,000 mi

    when you get the sprrd up to 40 mph it feels like it starts skipping and you speed up it stops

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  • Visitor, , 48,000 mi

    All of a sudden no power and my engine was backfiring. Had the computer checked and 3 ignition coils came up bad along with the oxygen sensor. No problems what so ever before this. Art Hill Ford quoted me $280.00/Ea to replace the sensors. WOW!! No Thanks. Checked on the part and they cost $40.00/ea plus you have to remove 1 screw to get the coil out. Takes about 5 min. per coil.

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  • Visitor, , 5.4L V8

    The ignition coils are always going bad. Very frustrating.

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  • Spark plugs have been changed and the coils have been changed too but the check light keeps coming on!!!!

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  • Visitor, , 4.6L V8, 200,000 mi

    misfire on #1 cyl code 301...changed plug 2months again code 301 misfire... changed coil pack... all good 6mo

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  •  Rookie

    Shuddering hesitation when accelerating and very low power. Check engine light went on after a few weeks of this(flashing initially, then full on). when I let it idle for 30 minutes, the engine light went off completely, but still hesitates badly. Others have said just replace the spark plugs. They apparently break often on this vehicle and minimum cost is $450 before using the tool specially designed to remove broken plugs, which I'm told has meant a $1200 tune up for others. I should also mention that I bought the truck 5k miles ago from Suburban Ford in Sterling Heights, MI.

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  • Visitor, , 82,000 mi

    hesitation when accelerating....all sparkplugs replced & coil...$850 at Ford!

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  • Visitor, , 5.4L V8, 141,000 mi

    Check engine light came on and read #4 cylinder misfire at start-up. Shop replaced #4 spark plug and ignition coil. $250. Said rest of the spark plugs could be put off for now to save money.

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  • Visitor, , 5.4L V8, 139,000 mi

    Had to trade in because Ford stated that the motor was gone.

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  •  Rookie

    Rainy day, hit a puddle near a corner (though not any deeper than about 6in) whilst turning at 10mph. CEL came on, flashing and alternately staying on at speed. Got worse over 2 days (dealer would not fix - Easy Credit Auto, OKC, OK), so I had to wait the weekend and drive across town to have repair done. O'Reilly Auto said code reader showed 2 plug packs back, but the mechanic who worked on it (the Credit Auto dealer warranty garage) 'repaired a leaking coolant line, removed, cleaned & regapped the plugs'. Engine is now running fine, but I'm most confused by all this!

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