Oil Pressure Dropping to 0
I have a 1996 Chevy C3500 with the 454 in it. It has started having an issue with the oil pressure. When I first start the truck cold I have good pressure at about 60. I can drive it around and onc...
Forum Discussion
On that era trucks (at least with the 5.7L and standard pickups), there was an oil pressure switch that would command the fuel pump to run. So if you lost oil pressure, the fuel pump would stop. I wonder if the 454/7.4L is the same... If you start it cold, then shut if off, can you hear the fuel pump run for a few seconds (even with the key off)? I ask this because the truck continues to run without oil pressure; the pressure switch should open and stop the fuel pump. In your case a bad sending unit or bad gauge in the cluster. I assume you get the 'Check Gauges' light.
+1 on running a mechanical gauge and verifying oil pressure.
+1 on running a mechanical gauge and verifying oil pressure.
