Initially, Ford suspected a bad batch of fuel pumps—the infamous Bosch CP4 HPFP, no less. After replacing the part with a newer, more robust unit in production, Ford (in communication with NHTSA ...
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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 ...
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