Diesel High Pressure Fuel Pump Failure. CP4 failure and cause explanation Cp3 Fuel Pressure Regulator
It's been a hot minute but we're back! Here I show you how to replace a fuel pressure regulator on a 6.6 liter Duramax engine. LB7 Low fuel pressure after cp3 Crank no start Issue fixed by cleaning or replacing the overflow valve. Bosch Cp3 pumps. This should work on all cp3 pumps. ...