What does P pump Cummins mean?
What does P pump Cummins mean? The P-Pump, as Tyler puts it, is “basically a little engine in itself.” Driven by the engine's cam gear, the P-Pump is an injection pump that gets fed fuel from the lift pump (which takes fuel from the tank). The injection pump's six plungers—which ride on a camshaft in the pump housing—move up and down in barrels. What is the Cummins code on a 1999 Dodge Ram? JACustomer: 1999 Dodge RAM... 1999 Dodge RAM 2500 4x4 cummins code p1689. Replaced injection pump and code came back after one day. How to check injection timing...