Disconnect both batteries, then start by removing the intake air manifold, preheater grid, and throttle assembly. The VP44 replacement begins just like an injector upgrade. The schrader/banjo bolt at the VP44 is where fuel pressure is sensed on this truck. A Westach 0-16psi fuel pressure gauge mounted in the cab is used to monitor fuel pressure. The lift pump delivers a steady 14psi at idle, and drops to 10psi at WOT. The low-pressure transfer (lift) pump was replaced around 105K miles with Cummins P/N 3990105 when the previous lift pump died. This particular VP44 pump wire has never been pierced nor has any fuel conditioner been added to the fuel. Power upgrades come in the form of a Van Aaken box. This truck is also outfitted with a BD turbo-mounted exhaust brake, Fleetguard BHAF with Outerwears prefilter, and dual exhaust. The fuel injection pump died without warning at 119K miles. The truck in this project is a 2000 Dodge Ram 3500 Quadcab 4×4 equipped with the 235hp Cummins diesel engine (engine order code ETC) and the NV4500 5-speed manual transmission. Please consult your Dodge service manual for complete instructions on the removal and re-installation of an injection pump This documentation is intended to be used as a visual overview only and is not meant to be used as a replacement for a service manual.
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