Oil Pressure Gauge?

Ok. Im just full of problems. My A/C is working just fine now, but now my damn Oil pressure gauge is not working. The needle is just hanging almost straight down (about 150 degrees). Any ideas? thanx guys

Anybody? Its actually now bouncing around but mostly returning down to its pointing down position? any ideas?

i got a 93 and my oil gauge does the same thing. when i'm driving it will bounce around and when i stop, it drops all the way down and my check gauge light comes.

put in a new oil sending unit, they are like $10, my truck had really low oil pressure readout on the gauge all the time, the switch was just bad, try that and also check the connector on the switch too