ok here is my problem i think i have a mechincal gauge all i have is a power a ground and a long clear tube that screws into something what the hell does this screw into every gauge install says remove oil sending unit that that is a plug sensor can anyone help

My advice:
Sell it on ebay and buy a real gauge.

what the hell is that suppose to mean

Run the tube through your firewall someplace, and look for a sensor on the back of the engine on either the # 3 or 4 cylinder (counting from the timing belt). It's pretty big, so it helps to have the right sized deep-well socket to get in there and get it out. (1 1/16", I believe).

Then just screw the end of the tube into there... it should come with a few adaptors, just see which one fits.

i think you are in over your head, if you dont know howto install a non electrical oil pressure gauge. my best advise is to sell it and buy an electric one.

you ground that long wire somewhere on the chassis; remove the oil pressure sender ( not just the electrical connector the whole sensor )
and then connect and read oil pressure. In your case i would recomend you leave that in your engine bay maybe to monitor idle oil pressures;
because i really dont want your next post to be

""Subject: SOB I JUST SPRAYED HOT OIL ALL OVER MYSELF AND MY CAR, WTF?""

Originally posted by midnitetill678
you ground that long wire somewhere on the chassis; remove the oil pressure sender ( not just the electrical connector the whole sensor ) and then connect and read oil pressure. In your case i would recomend you leave that in your engine bay maybe to monitor idle oil pressures; because i really dont want your next post to be ""Subject: SOB I JUST SPRAYED HOT OIL ALL OVER MYSELF AND MY CAR, WTF?""

Valid point man. I had a buddy who thought it was gonna be cool to have one in his pillar pod so not only did oil get on him but the inside of everything and on the windshield when it blew out at 50 some odd PSI. just do the smart thing sell it on Ebay and Buy an auto meter electrical guage (I like the sport comp series goes well in our interiors). They are easy as pie to install. Here's a link to a page I found.

http://johnseclipse.tripod.com/welcome/id8.html

if this is someone's link sorry about not asking permission

Sell it and buy an electrical gauge.

I have a mechanical and I like it :P in the silvia and the talon.

And "I" installed them so there will be NO oil squirting me in the eyes rendering me blind. :P