2003 Ford Expedition - Low Oil Pressure

Asked by Apr 05, 2017 at 10:15 PM about the 2003 Ford Expedition Eddie Bauer

Question type: Maintenance & Repair

Not long ago I drove to town without any trouble or incidents. I came home,
parked my vehicle. Not a single problem or noise. I have not attempted to
even start it in maybe 3 weeks. So I decide to drive it to town. The battery
was down. So I jumped it off. But this time, it would crank. But would not
start. First time it has ever not started. 75 degrees out. The only indicator is
the "oil pressure low" came on. Still will not start, but cranks just as it always
has.  The oil level was good. I have tried starting it a few times, and it cranks,
but will not fire. I noticed while it was cranking, the oil pressure does not
change while cranking. It remains at 'no pressure', which is odd, because it
has always had good pressure. Will "low oil pressure" indicator cause it not
to fire?  Does the pressure register while cranking? Any ideas?

2 Answers

104,425

Some of these were equipped with a low oil pressure cut off, so if the oil pressure dropped out the fuel pump shut off, your may or may not have this system. I would install a manual gauge on it and see if it is making oil pressure during cranking, if it is then you have a sender problem, replace it. If no oil pressure then you have oil pump trouble and it will need replaced.

Thank you tennisshoes for a great suggestion. I had wondered about that. The next thing I will need to check is if the fuel pump is working. It was sort of strange the way it happened. It was running perfectly when I parked it and shut it off.

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