The fuel pump then varies the timing relative to your Cummins engine speed. As the diesel fuel moves through the VP44 it is distributing the high-pressure, metered fuel to each cylinder at the precise time. The pump also meters the exact amount of fuel for each injection cycle. It first produces the high fuel pressure required for fuel injection. The fuel injection pump (VP44) is an electronic rotary distributor pump. Lets learn more about VP44 pumps below! What is a VP44 injection pump? Not to worry though! Diesel Addict will arm with the most information possible to make the problem a piece of cake. Sadly every 98-02 Dodge Cummins engine is destined to have a problem with the vp44 sometime in it’s life. Before we delve into how to find and solve vp44 injection pump problems, we need to learn a little more about the VP44 pump itself.
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