Question about 2002 Ford Explorer Sport Trac

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Truck jerks and wont idle smooth dies out run fine as long as not idling.

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  • debracloxton Oct 13, 2010

    already changed ox ygen sensors and fuel cleaner,no change auto zone hooked up to computer
    and gave codes 0171 and 0174 dont know what they mean but their not oxygen sensors. if sitting at stop sign truck will **** utill you put in neutral give gas the engine smooth out .I will check your wire suggestion when it gets dark thank you will let you know if you think of anything else let me know.

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Hi, unfortunately it could be a number of things causing rough idle and hesitation. It sounds like the engine might be confused about how much gas and air it is getting which might mean it needs a new oxygen sensor (EMISSION) or throttle position sensor. Start with the easy maintenance items like spark plug wires, air filter, and fuel filter if they have not been replaced recently. A bad spark plug wire may only occasionally short out and cause these problems. Try looking under the hood in the dark with the engine running and see if you see any electrical arcing around the spark plug wires or just go ahead and replace them if they are old.

It might just be a clogged fuel line/injector/ or pump, try to put some fuel cleaner in tank the next time you fill it up and see if that helps.

Posted on Oct 12, 2010

  • Tunde Autos
    Tunde Autos Oct 13, 2010

    Hi, 0171 and 0174 means that an oxygen sensor in bank 1

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