The oil pressure sender is behind the alt/AC bracket on block, a one wire connection. Either the wire is loose, the sender is bad, or you have low oil pressure.
Check oil pressure with mechanical gauge, if OK, then sender or wiring to it.
Get this fixed ASAP, if you do have low oil pressure, you will damage the engine beyond repair.
Sunday, April 12th, 2009 AT 7:04 AM