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Re: No Oil Pressure 89 f-250
ncrocket wrote:
>
> The other day my oil pressure game went to low. and you can tell it's
> not getting oil because you an here it in the motor. Sometimes when i
> first start up the truck it had oil pressure just fine. After driving
> for 10 or so minutes it drops to nothing. But if i shut off the truck
> and start it back up it goes right back to normal.
I'm not sure just when Ford went from a "real" oil pressure gauge to a idiot
light with an analog readout, but it probably was late 80s for the truck lines.
If there's a button type sender at the oil pressure output port, it's a fake
gauge that closes a switch around 7 psi and then reopens it at say, 5 psi. Put a
mechanical gauge on the oil pressure port and see if the readings are consistent
with the factory "gauge". If so, you have problems, ranging from a dirty sump
(oil pickup screen gets clogged) to worn main bearings or crankshaft. If not,
it's the gauge itself, the sender, or the sender wiring.
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