Question about 1999 Ford Expedition

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99 Expedition - Stutters and loses power when accelerating

My 99 Expedition stutters and loses power when accelerating then I have to ease up on the gas, then start to accelerate again to overcome power loss. Two codes showed up when diagnostics were run: light fuel and heavy fuel errors. The mechanic had no clue. Not sure if its a cylinder mis-fire, spark plug etc...

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  • Anonymous Mar 18, 2014

    I towed it to a mechanic, but as soon as they turned the key, it started right up. Diagnostics turned up zilch. After paying 200 bucks, I brought it back home and it ran for 3-5 days, and now it won't start again. when it is running it runs smooth, with no loss of power. Any suggestions?

  • Michael withrow
    Michael withrow Jul 27, 2014

    My expedition will not accelerate unless like you say I tap the pedal slowly then it will start to move but no power at all did you try replacing your plugs and wires



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My was doing the same thing, it was an EGR valve and a misfire on the #2 cylinder which required a new spark plug and a coil pack

Posted on Mar 13, 2009

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Always start with the simple first, change out the spark plugs one of them could have a hairline crack that opens up whenever it gets hot. Next try plug wires, lastly the coils. My bet is on the coils.

Posted on Mar 06, 2009


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