Question about 1999 Ford Expedition

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The engine misses..no engine light is on either??

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Just because you have no check light on,does not mean you don't have codes
Also things such as spark plugs,oil leak from valve cover,leaking onto plugs ( common on yours) and other issues such as, sensors going in and out of range,could be some of your problem.
You may have vacuum leaks,a need to, just clean MAF Sensor and so on. EGR Valve dirty or stuck open, Old slow reacting O2 Sensors ETC

Posted on May 07, 2010

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If the spark plugs and wires have never been changed thats where i would start . if this doesnt fix it then please feel free to ask me for more info. because this question is kind of vague and need more info eg: mis at idle or only on acceration, etc mileage.

Posted on May 07, 2010

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