First, remove the oil pressure line and plumb in a piece of tubing to a catch container. Start the engine and let it idle for a short time to see if any oil gets pumped out. It's possible your gauge has quit, or the line from the engine to the gauge is clogged, The relief valve in the base of the pump could also be stuck open. Have you pulled the distributor to make sure the oil pump drive tab on the bottom of the shaft hasn't broken off? Once the distributor is out, use a piece of 1/2" round stock in a drill motor with a drive tab ground onto the end of it to drive the pump clockwise. Like the logo on Sun test equipment machines used to say- - - - -"We test, not guess!"
Jerry
