1998.5-2002 DODGE CUMMINS ISB VP-44 INJECTION PUMP IPV17X (HIGH OUT PUT)

Diesel System Services specializes in the Cummins ISB engine used in the Dodge, RV and industrial applications. Issues with the ISB center around the VP-44 injection pump and fuel system. Loss of fuel supply is the normal cause of premature injection pump failure. Fuel supply problems are normally the result of a weak or failed lift pump which results in injection pump fuel starvation and overheating. The stock lift pump supply output starts to weaken typically around 45-55,000 miles and is completely out of specified supply specifications around 65-85,000 miles. The lift pump usually will give little or no indication of a failure until it’s too late. When a lift pump fails it is designed to go into by-pass, allowing the vain pump in the VP-44 to continue to pull fuel. Once the VP-44 is put in an inadequate supply situation internal injection pump damage begins. The indications of an internal damaged VP-44 will be loss of mileage, slight loss of power, hard starts, intermittent power l