1998 Mercury Tracer Logo
Posted on Mar 19, 2009
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Hesitation and Rough Idle

Car seems to grab and hesitate terribly upon acceleration and thenirregularly dip in RPM at idle. Changed plugs/ wires/ electronicignition coil/ air filter / IAC motor. Fuel filter was changed a yearand a half ago and it still has the original fuel pump. Anysuggestions?

  • Anonymous Mar 22, 2014

    just replace, plugs, wires, coil pac and massive air flow device

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  • Master 6,784 Answers
  • Posted on Mar 19, 2009
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Joined: Jan 28, 2009
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Hi, you stated that the original fuel pump is still installed. I would replace this pump as soon as possible. this may be the key issue. You can check the voltage on this part by using a voltage meter. you should get 14 volts here. if its less than 14, it will run weak , in return, preventing proper fuel flow. I would also check the injection system to see if its running properly as well.


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