Question about 2000 Ford Taurus

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My 2000 Ford Taurus at about 4000 rpm does not go further with rpm even when accelerator is press more. It gives off a pulsating choking sound at above mentioned rpm. At below 4000 rpm the engine runs smooth. It could be a faulty air sensor?

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  • rwpotocki Feb 19, 2009

    Hi Chuck943.
    It happens while driving and when in park gear. I did not check in neutral gear as of yet. Engine starts nicely in park gear, drives smooth with no problems, but when needle RPM gauge is about at 4,000 rpm and when I press accelerator further more the rpm gauge needle stays at about 4, 000 rpm and engine chokes in the pulsating manner like puff, puff, puff even when I press accelerator pedal all the way to the floor. Thanks Chuck943.

  • rwpotocki Feb 19, 2009

    Thank you very much Chuck, you are wonderful and fast with replies.

    I did not inform you that I also had a check engine yellow light on my instrument panel was on when driving and at park.Then I decided to disconnect the positive and negative clamps on the battery and after few minutes reconnected them back. The check engine light of the instrument panel disappear (turn off itself). But it might show up again I think. Maybe this behavior might indicate something else.

  • rwpotocki Feb 20, 2009

    Thank You Chuck very, very much for your professional advice and prompt response.

    Have wonderful days in your life ahead and God bless you and your family


  • Chuck Martin
    Chuck Martin May 11, 2010

    Is this while driving or when just reving engine in park or neutral?



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To do this in park or neutral is normal. To do it while driving is not.
There are so many things that could cause this but if you have no check engine light and it runs normally up until then I would suspect you have an exhaust restriction. This can be checked fairly easy on this vehicle, it has a DPFE sensor that mounts near the top back side of the motor.It will either be black or silver,will have a 3 wire connector to it and 2 hoses going down the back of the motor to the exhaust. You can disconnect one of these hoses and install a vacuum/pressure guage and measure exhaust back pressure. It should be 1 psi or less at idle and when you go to wide open throttle should not exceed 3 to 4 psi. If it does something in exhaust,most likely one of the catalytic convertors is stopped up.

Posted on Feb 19, 2009

  • Chuck Martin
    Chuck Martin Feb 19, 2009

    Yes it would be good to have the codes retrieved to determine what systems are suspect however,the test of exhaust back pressure can be done to verify exhaust restrictions and done very easily on this vehicle.



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