Oil Pressure guage not showing pressure
Thread Starter
Junior Member
Joined: Sep 2010
Posts: 3
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From: Verona North Dakota
Car: 1988 Trans Am
Engine: 305 TBI
Transmission: 5 Speed manual
Oil Pressure guage not showing pressure
I know there is oil pressure but how do I tell if it is the sending unit or the guage that is not working
Senior Member
iTrader: (2)
Joined: Dec 2004
Posts: 682
Likes: 1
From: Orlando,FL
Car: 1987 GTA Trans Am
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Borg Warner 9-Bolt 3.27
Re: Oil Pressure guage not showing pressure
Have you checked to see if your unit is hooked up? What does the gauge do when you turn the key to the "ON" position?
Supreme Member
Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Oil Pressure guage not showing pressure
Grounding the guage wire should peg the guage all the way one direction or the other when key is on.
If you have the OPSU with 3 wires, make sure you don't ground the wrong one - one of the 3 comes from the battery and is a +, the 2nd runs to the fuel pump and is a +, and the 3rd works the guage which should be a ground.
If you have the OPSU with 3 wires, make sure you don't ground the wrong one - one of the 3 comes from the battery and is a +, the 2nd runs to the fuel pump and is a +, and the 3rd works the guage which should be a ground.
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