Question about 1998 Ford Windstar
My van is unattended for a week or more at a time, once I found the door unlocked and it would crank but not start, and no 2 sec fuel pump run. I finally found that the PCM fuse was missing (under dash fuse / relay panel). I replaced it and now the fuel pump runs but still no start, like no ignition or fuel injection or both. According to the manual there is a spot for an Anti Theft Diode in that same panel, but no sign of it, plus some relays missing, could this be the cause? I have some extra junkyard relays I can try, is the diode really supposed to be present? I need this van to finish moving, Help! Thanks, All, Bob
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Posted on Jan 02, 2017
If you don't think your getting the ground command through your PCM, you can make your own ground just by bypassing the PCM all together. First you need to find a PCM connector end view showing which pins are which wires and locate the ground you need for that circuit. Then you need enough wire to loosely run from your battery negative terminal to the PCM connector. I you can back probe the PCM ground wire with a sewing needle and wrap the new wire around it, and attach the other end to the batt. neg. your just allowing the PCM to get it's ground another way. If it still doesn't start, try swapping fuel pump relays w/ a head light relay or one w/ the same part number on it. If you can't find one, just hot wire the pump relay again just to see if it starts and runs. If it does start and run you'll need to go to a wrecking yard and pick up a used PCM and maybe buy a relay for the fuel pump. I sincerely hope this info helps in some way.
Posted on Aug 07, 2009
Just for the hell of it replace the fuse with a new one relative to the fuel pump also clean and inspect all electrical plugs and connections associated with the fuel system. There may be a bad ground with out the truck in front of me it will be difficult to go any further it is possible the pump is not creating enough pressure to close the relay have you replaced the fuel filter? If possible do a fuel pressure check at the fuel rail it should be 30 - 40 psi if not replace the pump.
Posted on Oct 05, 2009
Another place to check are the O2 sensor wiring, where they are routed past the exhaust manifolds or by the exhaust pipes. Some times the wiring can lay against the exhaust system, melt the insulation, and this causes a short to ground, which can be consistent or intermittent fuse blowing.
If you turn the key to the run position ( do not start ), you should hear the fuel pump run ( if it has not been cycled in a bit, it will shut off after 3 times of no start, as the fuel rail is at pressure ). You can check for fuel pressure at the schrader valve on the fuel rail, make sure to be careful to contain the spray ( do not want this on engine parts that can ignite ).
Posted on Jun 08, 2010
what is the fuel pressure reading, chances are u just have a defecive fuel pump, if the pump is running u will hear it when the key is turned to run for one second, so do it repeated time off then on and listen, if u hear nothing repalce the pump.
Posted on Sep 22, 2010
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