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2G Oil pressure gauge

98gstJames

Proven Member
162
31
May 25, 2022
Virginia
Alright I know there are a million threads on this but I can’t seem to find any full answers just partial on it. Since I got the car the oil pressure gauge has not worked and I’ve had that on my mind, the car just had too many other issues but now I’m on it. I have a brand new OEM sending unit on my OFH. I’m not trying to get the one in the dash working because I have a oil pressure gauge in my cluster.

So I have a signal wire running from there up to my gauge and my power supply going to the gauge (12v, ign and ground). I’m thinking I need a ground somewhere for the sending unit because when I turn on the key the gauge comes on and everything but the hand in the gauge goes straight to the bottom until it hits the gauge itself. I’m just not sure if there somewhere else I need to hook up or if it’s a ground or what?

Also the factory wiring for it is more than likely destroyed because I have not been able to find it since I got the car and I’ve pretty much used all my plugs except a few and I’m pretty sure none of them are the plug.
 
Last edited by a moderator:

steve

DSM Wiseman
15,136
1,869
Feb 3, 2002
Boulder, Colorado
Just to be sure, you're not trying to connect an aftermarket oil pressure sensor to the factory gauge or the Factory oil pressure sensor to an after market gauge. You're also not connecting the low oil pressure warning sensor to anything other than the light in the cluster, right?

I don't seem to have a picture of the 2G Oil Filter Housing but maybe the 1G picture will help.

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If you're trying to hook up an aftermarket sensor and gauge make sure you have the BSP thread to NPT adapter and the sensor is in the correct port.
The sensor will ground via the engine block so make sure you haven't insulated it with teflon tape. Pipe thread are typically self sealing so no tape.
 

98gstJames

Proven Member
162
31
May 25, 2022
Virginia
Just to be sure, you're not trying to connect an aftermarket oil pressure sensor to the factory gauge or the Factory oil pressure sensor to an after market gauge. You're also not connecting the low oil pressure warning sensor to anything other than the light in the cluster, right?

I don't seem to have a picture of the 2G Oil Filter Housing but maybe the 1G picture will help.

You must be logged in to view this image or video.


If you're trying to hook up an aftermarket sensor and gauge make sure you have the BSP thread to NPT adapter and the sensor is in the correct port.
The sensor will ground via the engine block so make sure you haven't insulated it with teflon tape. Pipe thread are typically self sealing so no tape.
I’m trying to use my aftermarket oil pressure gauge on the factory oil pressure sending unit, I thought it was possible by just wiring it to the aftermarket gauge and have the readings just go to that gauge instead of the factory one in the cluster, I would fix the one in the cluster but I don’t even see the wire for the factory one so that’s why I was trying to just pretty much hard wire in the aftermarket one just so I could see my oil pressure.
 

steve

DSM Wiseman
15,136
1,869
Feb 3, 2002
Boulder, Colorado
Sorry, the sender and gauge are a matched set. Each vendor can come up with whatever way it wants to talk between the two.

The factory sensor works with the factory gauge unless you test it to characterize it and build a gauge to match.
 

Vegas Smith

20+ Year Contributor
5,063
2,942
Dec 2, 2002
Houston, Texas
Grab yourself one of these and relocate whatever sender you're using to the driver wheel well:
Run your wires up through brake line gromet all the way through the firewall gromet near clutch master.
 

98gstJames

Proven Member
162
31
May 25, 2022
Virginia
Grab yourself one of these and relocate whatever sender you're using to the driver wheel well:
Run your wires up through brake line gromet all the way through the firewall gromet near clutch master.
Thanks man, I’ll go this route with it then.

Sorry, the sender and gauge are a matched set. Each vendor can come up with whatever way it wants to talk between the two.

The factory sensor works with the factory gauge unless you test it to characterize it and build a gauge to match.
Well that makes a little bit more sense why it won’t read anything, I’m gonna use the adapter line to run it to the gauge to use an aftermarket one.
 
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