It is a well known issue that the injection pumps installed in all the Cummins diesel engines manufactured by Dodge between ‘98 and ‘02 have had their fare share of problems with the Bosch VP44 injection pump.  It is also one of the most expensive components of the diesel fuel system to replace. As per the Cummins website. “The Bosch VP 44 diesel pump has not been as reliable as we had hoped”.The Bosch VP44 is an electronic rotary distributor pump that can vary fuelling and injection timing, and also contains fuelling, timing, and diagnostic data.

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