Oil Pressure Gage
 

Never Has Worked,ran Jumper Wire The Gage Pegs, Switched Gages Works Fine , New Sender, Now The Tach Quit Wtf. Help

Check your connections at the dash.

well after all this the sender wire was bad, and the two new senders i got from oriellys are wrong put a sender out of another motor w a jumper wire and it works.