The Bosch VP44 Dodge diesel injection pump is a workhorse of a pump, but they are prone to a few problems. If you are experiencing intermittent hard starting and white smoke, then there may be an electrical problem with the computer on top of the pump. This is caused by excess heat and requires pump replacement. Also, severe internal pump damage can occur if fuel supply pressure drops to 5psi or lower, especially under heavy loads or high rpm's. When this happens, you may notice low power or it may seem like the engine won't rev up the way it should. Eventually the diaphragm in the front of the VP44 will rupture. This results excessive vibration of the timing piston which then causes damage to the front cover of the injection pump. (DTC #P0216) Also, the head & rotor in the pump may seize resulting in a "no start" condition. Dodge acknowledged this issue by replacing the supply pump on the the engine with a tank mounted supply pump. This is a costly replacement for below average results, especially if you have made any performance modifications such as a tuner or hi-performance injectors. The best way to deal with this problem is by replacing the factory fuel supply pump with a FASS supply pump. A FASS system will supply constant pressure under any load to the injection pump, virtually eliminating VP44 damage due to low fuel pressure.

If you do not see a VP44 Dodge diesel injection pump for your application, just give us a call at 1-800-823-4444 and one of our high performance exhaust specialists will be happy offer suggestions on the best exhaust for you. You may also inquire via email at info@usdieselparts.com