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Question about my father in laws 1995 F150 with a 5.0L engine. He was driving today and noticed that the oil pressue gauge dropped to "below normal" (I am assuming it spiked to the left of the gauge). He shut the engine off and waited for everything to cool off and started it up and came home (approx 30 miles of interstate travel).
First guess was the oil temp sending unit. Went to AutoZone and got new one and replaced it. As soon as he would go over 40 mph, the oil pressure would drop again.
Only other guess would be the oil pump, but thought that the oil pump either worked or didn't (did not think that it could gradually die).
I know this is not a lot of info, but thought I would post a few of the details and see what everyone's thoughts are.
Thanks!
 

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TTB Hater of course
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Is it knocking when the gauge claims no pressure?

Ground the wire at the sending unit and see if the gauge reads Normal, it should. It's possible the wire is chafed, corroded or otherwise damaged.

If it's not knocking all I can tell you is what I tell everyone: install a real, mechanical gauge.
 
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