I have a 73 GMC truck with a 454. High miles. Oil pressure drops to 0 then bounces back up at 60 mph any ideas on the problem?
I'd put a manual gauge on it first to see if the oil pressure is actually dropping out. It could be just a bad sender or an intermittent open in the gauge wiring.
Ditto on the mechanical gauge.
Search Maintenance & Repair Questions
Maintenance & Repair Experts