Hi i have a 96 z28 and it is reading low oil pressure on the cluster. when warm it is reading 0. i cheaked it with a machanicl gage. At idle it it 15 and stays in spec when you breing the rpm up. i replaced the sending unit and it is still not working. i have no clue what it is help will be great. thanks

 

What brand sensor did u purchase .local parts store ? Or gm or ac delco

 

It isn't likely that second oil pressure sensor doing the same thing as the first is a fault of the second sensor. Tou'll have to look to the wiring to sort this out...

If the wire is disconnected you get max reading on the gauge. If the wire is grounded youmgetbzero on the gauge. Sounds like the wire is grounded somewhere..maybe worn through and touching the block....

 

I got a bwd from advanced auto.(multiply) I dont think it is the wires because i have a gm shop manully and it say unplug it and run the car the gauge should spike witch it did.

 

also when cold the gauge is in the middle like 40psi. the it goes down as it goes up thats normal, but it goes to 0 and you have to bring the rpm up to 2000 to get it to move and when it does it goes to 20 psi.

 

If its high mileage could the pump be wearing out?

Have you checked the voltage coming to the switch to see if its getting proper voltage? You'll need a voltmeter for that. I have a '97 GM shop manual I can look for the test procedures of the switch if you don't have that info. I am sure the '97 isn't different in regards to that switch than the '97.

 

I'd suggest taking a look at the oil pump stub drive.

 

It has good pressure looking at the machanical gauge i hooked up to it for a week. it the electric one not working. i was thinking it could be the motor in the cluster that drives the needle but not sure. has any one herd of the motor in the cluster going or is it not likely the problem