Crank No-Start on a 24-Valve Cummins? VP44 Injection Pump Guide
The VP44 replaced the mechanical P7100 injection pump starting in the 1998.5 model year, bringing electronic control of timing and fuel quantity to the 5.9L Cummins for the first time. It generates injection pressures up to 100 MPa and uses an internal pump control unit alongside the engine ECM to precisely manage every injection event.