Oil pressure spike

Out and about today notice my oil pressure at 90psi
when it usually runs 50-60 little higher when engine is cold
if I start to unscrew wire on sending unit
seems to jump around as soon as I touch it
is there a ground somewhere for it?
if I start the engine and turn it off and restart
seem to get different reading
truck runs and sounds normal
should I change the sending unit?
if so should I find the original part or is there a generic one I can replace it with
thanks for your help

Trust a military gauge like gas station sushi.


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Go with a mechanical gauge both oil pressure and water temp.

Thanks for the help
not sure what gauge’s to get
What do you recommend a mechanical
gauge
is there one that will fit in the current holes in the dash?

Plumbing in a cheap mechanical gauge will give you some reassurance’s about true pressure. It is up to you whether to keep it n or not.
You most likely have ground issues and/or a bad sensor or gauge, or all three since our trucks are old enough to have multiple faults.
I recommend installing an inexpensive mech gauge and then checking ground, then pulling the sensor and cleaning it and checking it’s wiring. The problem , if it’s not engine related, should be gone by the end of those steps.
Bulldogger

Use whatever your budget will let you. I've used Stewart Warner, Autometer, Bosch, Sun, etc with good results. Any 2" gauge will fit.

Thanks for the advice
I’ll start by first checking all connections and I will take out and clean the sending unit

Stevev said:

Thanks for the advice
I’ll start by first checking all connections and I will take out and clean the sending unit

Click to expand...

Clean and scuff the ground at The gauge cluster as well. That’s typically the problem after the gauge going to crap.


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