Even the CP3 injection pump which replaced the more problem laden VP44, and offered better performance on the 5.9-liter Cummins, is known to create more pressure, which can lead to problems on the ...

5.9-Liter Cummins: Third Generation (24-Valve, 2003-2007, CP3 Injection Pump) Despite its issues, the VP44-equipped 24-valve edition of the 5.9-liter was highly desirable. There are a lot of late ...