To start i have a 91 camaro. The problem i am having is the guage cluster. My oil pressure guage does not work. It is a newer style guage cluster where everything is electronic. I did check my connections at my oil pressure switch and they are good. Does anyone have any ideas to what it could be? Please help Thanks Gregg.

 

could be the sending unit, either the one your using is bad or its a sending unit for a dummy light... other than that, check the connections at the gage.

 

The guage reads past 60 like 80 if there was an 80 on the guage. the needel twitches when i turn the ignition on but just stays there. could the guage be bad?

 

I was gonna suggest that.Try swapping the gauge.

 

Hmm well i would hold off on replacing that gage for the moment... Im positive its your sending unit now... All a sending unit does is ground or un ground the connection, and when it grounds the connection the needle will move, indicating an increase in oil pressure, and when it is ungrounded the needle stays where it is, unless there is a drop of pressure where it then reverses polarity to drop the gage..
------------------------------------------------------------------------------------ Well the sending unit for the dummy light should constantly ground out once some oil pressure is obtained, thus keeping the light off, and your gage needle buried past 60... It twiches when you turn it on because just before the car started there wasnt any oil pressure, so it was going to move the needle to read 0... im 100% sure the sending unit is the problem

 

my gauge would do some weird things too. Like do what yours does and then go way past 80. Turned out to be the sedning unit. A few bucks later and I'm all good to go

 

Thanks for your guys help. You any of you guys know if the sending unit is a two or a three prong unit?

 

one prong. it is a silver "bell" shaped thing near the distributor on the drivers side. it is fed by a single brown w/gray stripped wire (iirc) that comes out of the same harness that holds the wires that go along the valve cover and in to your fuel injectors and alternator on the drivers side. should be relativly easy to replace. but be carefull, that spade connector is easy to break off.... that kinda why i just spent the $32 to replce mine...

 

Get a mechanical gauge and the proper fitting and hook it into where the sending unit is on the back of the intake and start the engine, if it reads pressure your sending unit is gone.

Just go out and buy a cheap gauge nothing fancy because it is just for testing purposes.

Hope this helps

 

I will try the guage and see what it reads. Here is another question for you guys, there is another sensor type of thing on the back side of the block. It is right behind the distributer. it has a two prong connector. any idea of what that is for?