Question about 1998 Ford Windstar

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1997 Ford windstar Low power and very poor acceleration under load. Bogs down severly under load. No codes, fuel pressure at 35 at idle and around 40 under a load.

Posted by mattcad992 on

  • 4 more comments 
  • mattcad992 Oct 21, 2009

    Hello,

    I just replaced the pump and filter.

  • mattcad992 Oct 21, 2009

    The regulator has not been replaced, when I disconnect the reg, the pressure increases. maybe I can try that and see if it improves. What do you reccomend for cleaning the MAF?

  • mattcad992 Oct 21, 2009

    Thanks, I'll try that first thing tomorrow. I work nights

  • mattcad992 Oct 22, 2009

    OK, I unplugged the MAF, the idle quality seemed to improve slighty but no change overall. I took it off and cleaned it but no change. I did notice the power was a bit better before the engine got up to temp, not good but a little better.

  • mattcad992 Oct 27, 2009

    Hello, The back pressure test seemed fine. In fact very low. Any other ideas, you've been helpful so far.

  • mattcad992 Oct 27, 2009

    No I haven't

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2 Answers

Marvin

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35 is low fuel pressure, should be around 40-44 PSI and 46-50 PSI under a load, replace the fuel filter it may be clogged.

Posted on Oct 21, 2009

  • 3 more comments 
  • Marvin
    Marvin Oct 21, 2009

    the pressure is still low, has the fuel pressure regulator been replaced? have u tried cleaning the MAF sensor?

  • Marvin
    Marvin Oct 21, 2009

    the dosn't set a code when it fails and it can cause this loss of power symptom, a quick test is to diconnect the MAF, the computer failure strategy program will kick in and the car will run better if the MAF is the problem, have been a Ford dealer tech for 30 years seen this MAF problem many times, perhaps the fuel pressure gauge u are using is inaccurate.

  • Marvin
    Marvin Oct 21, 2009

    we experts do this for free just to help, please rate our help, that is all we ask.

  • Marvin
    Marvin Oct 22, 2009

    are you sure u don't have a plugged catalytic converter? have an exhaust back pressure test run

  • Marvin
    Marvin Oct 27, 2009

    Have u ever had the engine analyzed for mechanical problems? timing chain can cause this.

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Anonymous

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You could always try a tune up. (plugs wires and fuel filter) run some fuel injector cleaner anyway. it wont hurt. otherwise you might have a coil going or even the whole ignition control module. Cars do weird things sometimes depending on the severity a misfire doesn't always throw a code. also as an option check your throttle body. maybe your getting slightly more air than fuel or vice versa.

Posted on Oct 21, 2009

  • Anonymous Oct 22, 2009

    ya emissionwiz this may be better off for you to handle. even though general knowledge should be about the same i'm not much of a ford person. i'm more of a GM person

  • Anonymous Oct 22, 2009

    :-) see emissionwiz i haven't even been alive for 30 years yet. compared to your experience i probably just got my toes wet. but i have been around long enough to know some things are caused by the weirdest things and more than often thinking a repair is easy can result in it taking longer than expected or having to fix something else you didnt think of. (for example. brake line and sheering off the bleader scew lol)

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