3/29/2021 0 Comments Cummins Vp44 Injection Pump
First, the engines dont have the killer dowel pin problems that plagued 5.9Ls of the 94 to 98 models.And engines in 98 12 to 02 trucks are also easily upgraded for increased performance, thanks to inexpensive fuel injectors and electronically manipulated fuel and timing trims.
Its not uncommon for rigs of this later vintage to put 400 to 600 hp on the ground. ![]() If a truck has 250,000 to 300,000 miles, it could be on its third or fourth injection pump. This VP44 problem is so mainstream that companies have started building injection pump pullers for those who are looking to tackle the job. Cummins Vp44 Injection Pump Install Is DoneTo see how a VP44 removal and install is done, we followed Matt Ray and mechanic Jared Estrada at Siskiyou Diesel Performacnce, a Central Point, Oregon, shop that averages two or three VP44 replacements per month. Note that this plug has a sliding portion thats used to lock and unlock it from the pump port. When performing this task, keep the clamps that hold the individual injector lines together attached (arrows), so the lines go back into the truck smoothly. However, before it can be extracted, the engine must be slowly rotated until the pump keyway faces up to ensure a broken or loose keyway wont fall into the gearcase when the pump is removed. With Matt holding the alternator, Jared torques the nut on the gear to the recommended 125 ft-lb. Jared starts by laying the lines out, then tightens them down at each injector first. Before reinstalling the intake horn (remember to remove any rags from the intake), a new gasket is set in place.
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