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1997 Ford Expedition Question: why does my truck cut off when I apply the break

 

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vlberry1983, 5.4L V8, Barco, NC, May 02, 2014, 10:40
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The battery keeps going dead but whenever the truck is started it idles high as if the gas is being pressed. When in another gear if I press the break it cuts right off

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    G. T. Service Center (4191 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG May 02, 2014, 10:46
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    We could only guess without further testing, and guessing could lead you in the wrong direction.

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    vlberry1983, May 02, 2014, 11:14
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    Is it possible it could be the coils gone bad? I've had people tell me the coils, the air filter, the spark plugs need changing. Is any of these possible

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    ProfessorG, May 02, 2014, 11:23
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    If the coils are bad, it would be missing really bad, plugs would be the same way. When brakes are pushed, there could be a problem with the vacuum, which could be causing the high idle. It could also be a situation with the electrical, have had that as well with Ford trucks.

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