Quote:
Originally Posted by ray_mcavoy
Yes, the 80 psi oil pressure gauges are most commonly found in trucks with diesel engines. I think some medium duty trucks with gas engines might have used the 80 psi gauges as well.
Also, if it's a 1978+ electric gauge, the sending units tend to be more failure prone than the gauges themselves. So that might be worth checking if you haven't done so already.
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I was kind of thinking it might be the sending unit too. It was unplugged until today when I plugged it back in and noticed how it was acting. I have a new sending unit already on an order I am placing. I might just see if that does the trick but may also buy a gauge anyway. Never hurts to have some spares.