Why could be wrong if a 2002 Ford zx2 revs up or shuts off when clutch disengaged.?

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rogerz616

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While coasting with the clutch disengaged the car sometimes shuts off. It does not sputter and die, it just shuts off. Recently, the car began reving up with the clutch disengaged and sometimes gives a cruise control like effect while driving.

I replaced the fuel filter and spark plugs but the only difference now is a much better running car that shuts off or revs up.

I am trying to fix this lemon of a car until I can afford to replace it and I am wondering if this could be caused by a bad throttle positioning sensor? Could it be the MAS or an air leak of sorts? How can you test for these problems or what are the typical symptoms?
 
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