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CP4 Pump: Which Diesel Engines Use It And Why Is It So Problematic?Starting in 2011, Ford and General Motors began using Bosch Mobility CP4 pumps to provide high pressure fuel to their diesel engines. GM used the pump on its 6.6-liter LGH and LML Duramax diesel ...
Unfortunately, in the case of the Duramax, the Bosch CP4 fuel pump can become a weak link in the fuel system, creating several problems. Owners have voiced serious issues like sudden power failure ...
Bosch CP4 RP7 is what Ford calls the suspect HPFPs. The CP4 is also used by crosstown rival Ram in Cummins I6 turbo diesel-powered trucks, beginning with the 2500 series. Turning our attention ...
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