Question about 1995 Ford Windstar
I have a 1995 Ford Windstar with a 3.8 litre engine that idles rough and has poor pick up. The Tach goes up quickly but the speedometer does not. The Ford dealer put it on their analyzer then they replaced the electronic coil and cleaned the mass air flow senser for $500. !!! It stil idled rough. They scoped it again and told me it was the spark plus and wires that needed to be changed. I bought new ones and changed them, but it still runs rough. They also said the DPFE and the O2 sensor needs to be replaced. I haven't done that yet. Is that what the problem really is, or is it a fuel problem like a fuel filter or injector that is plugged. Would you please advise me as to what you think I should check or replace that will solve the problem? I can't keep spending alot of money of this without solving the problem. Thanks so much.
The speedo gear is in the tranny in that model i believe so thats a seperate issue..
to the rough idle, it could be a multitude of things. the MAF could cause it, you can get one online for cheap. cleaning it is sometimes not enough.the o2 sensors do one thing, that is tell the ecm how much fuel is being burnt in the cylinders, if it is too rich it leans out, if it is too lean it gets rich..
put the vehicle into drive with your foot on the brake, slowly give it gas if it revs like normal it is a spark/ignition problem, which can also be low compression. if it doesnt stumble and run bad with a load on it it is most likly a fuel issue. you have to rememeber that if the o2 sensor is bad, it will cause a misfire by pumping too much fuel into it. try a compression test, remove all plugs, screw in tester, crank engine, record psi. if the psi is lower than %15 of the highest rating then the cylinder has low compression. add a teaspoon of fresh oil into the cylinder and repeat test. if the compression goes up the rings are faulty. if not it could be a bent valve or somethign along the lines of a valvetrain problem.. good luck
Posted on Jun 21, 2009
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Posted on Jan 02, 2017
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