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low oil pressure or bad sensor or something else
#1
Wrench 
My oil pressure has been different lately and I am not sure why. Its used to read 3/4  to high and then drop to mid point when the engine warmed up. Now it reads 3/4 to high  but will drop down to nothing once the car warms up. The sensor is about 4 years old. I did pull the wire off and clean the post. That didn't make a difference. I have a extra sensor so I will change it out next. Car starts and runs fine. oil level on the dip stick is good.   The only work I did to the engine was changed out the valve cover gaskets.


Thanks


John
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#2
I have a mechanical oil pressure gauge that I use for these situations, along with a variety of fittings, that I have had for many years.

You can get a gauge kit at Harbor Freight:
https://www.harborfreight.com/engine-oil...62621.html

A mechanical gauge shows minor fluctuations in real time. Useful for spotting worn bearings, especially main bearings, when there's a lot of change from acceleration to deceleration.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#3
yes put a pressure gage on it to be sure.. but if hot idle and no valve tapping then good chance not the pump but gage or sending unit.
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#4
Make sure you pay attention to the fuel gauge and temp gauge when you see the oil pressure fluctuate. If the other gauges move in time, could be a constant voltage regulator issue


[Image: image.jpg]

Dennis
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