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It skips alot what cause that - 1997 Ford Expedition

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If by 'skip' you mean it misses, it is almost always an engine electrical problem, specifically the secondary ignition system (coils, plug wires)-do you have a check engine light? If you have coil packs (one coil feeds 4 plugs), they can and do go bad. You don't say what engine you have, but if you have plug wires and they have never been replaced, it is a good place to start-do the plugs while you are at it. If you have coil-on-plugs, you may have oil in the plug wells, a very common issue with fords and it requires removing the valve cover and installing new gaskets, and possibly replacing shorted coils. Again, the check engine light will allow you to pinpoint which plug is 'missing', so if you don't have one yet, you should soon see it. there is also the possibility that a fuel injector is not opening-

Posted on Mar 11, 2011


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