HOTROD VP44 will give an additional 5-10% more fuel, add timing, and add 40+ HP. This pump is the best of the SO and HO pump. Basic construction includes the larger plunger of the SO pump and the more aggressive cam and head from the HO pump. Those that install this pump will experience better low end power and supports about 650HP with larger injectors, turbo and fuel system. Some people may experience a slight lope. Pump has new electronics, new steel sleeve, new housing, upgrades to the newest internals. Uses all BOSCH parts and has 1 year warranty.
1 Year/ Unlimited mile warranty
Free shipping and Free return shipping of the core for 48 states. No core charge required if core is returned in 30 days. Cores not returned in 30 days will be charged the $400 core charge.
Click here for instructions for removal and replacement:
You-tube Video part 1 of 5 for those who need more visuals.
VP44 info:
The VP44 Is dependant on the lift pump for Cooling and Lubrication. If the lift pump fails or is unable to keep 10psi of fuel pressure then your pump is susceptible to damage, overheating and failure.
Often if your VP44 failed the root cause is a bad or failing lift pump. The stock pump does not supply sufficient pressure for stock power. It is mounted to the engine block and has to push through some small fittings and lines that act as a restriction, even worse the pump has to pull fuel all the way from the tank and electric pumps are designed to PUSH not PULL fuel. The in tank pump recommended by Dodge dealers is not really any better it may flow a slightly higher volume but at pressures even lower than the stock pump. It is placed inside the fuel tank to keep it cool and reduce failures, but when it fails you are out another $500 for the dealer to drop your tank and replace the pump again.
Defective VP44 Codes:
The retrieval of codes does not constitute an engine diagnosis. However, there are some codes that usually indicate a defective injection pump. A current P1688 always means that the pump is bad, there is no further diagnosis required. Code P0216 is probably the most common code for VP44 Pumps. If transfer pump pressure has been checked and is O.K., the injection pump is defective. Other codes that are less common are P0180, P0181, P0215, P0251, P0252, P0253, P0254, P0370, P1287, P1689 and P1690. These codes USUALLY, but not always indicate a defective pump. There are wiring and power checks to be performed if these codes are present. These codes relate to Dodge pickups only, and are not for any other ISB application.
