I'm having problem with my windstar electrical system shuting down driving at highway speeds al the lights start to dim inside and out I can pull over and set at idle for a minute and every thing goes back to normal voltage at idle is 14 volts no load 12.9 with everthing turned on lights a/c fan ect but while at highway speed it will go from14 volts to 0 voltsin less than a minute
I'd check the alternator and the grounds.
SOURCE: The engine boggs down at high rpm. For instance,
if the fuel filter hasn't been changed do so, if the fuel filter is ok and has been changed out due to this problem you will need to monitor the fuel pressure under a load and make sure it doesn't drop below 45 PSI, it it does you will need to replace the fuel pump and the fuel filter. U also do say if you have a check engine light or have had the system tested for trouble codes that may be triggered by this loss of power problem.
SOURCE: 1998 ford windstar stalling at highway speed
i had the same problem. found out its the fuel safety switch. try that.
SOURCE: I have a 1996 explorer
I am sorry to say that I do not have an answer for this one, BUT....
I must tell you that:
YOU ARE ON THE BALL, SIR....
and even though I cant give you an answer it as AN ABSOLUTE PLEASURE to read through a problem where somebody has done his homework for once! You know your "sheet" and you should consider signing up to FixYa and doing what I am doing right now.... for you, most of the stuff will be a cakewalk...
Anyway, if you are checking the input voltage to your MAF sensor there is no reason whatsoever that it would be less than 12V.... It IS the INPUT!!!! My advice is to surf for your wiring diagram if you do not have it.... when you are certain that you have an accurate one, follow it through on your own and ignore any "advice" you may have to this point... it sounds to me like you know your basics and can follow a diagram no sweat.
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