The fuel injection pump is the heart of the diesel fuel injection system. It is a highly precise, mechanized devise that places fuel under high pressure – meters it accurately – delivers it in proper sequence to the diesel injection nozzles, and injects it into the cylinders in the form of a very fine spray with precise timing.
In order to meet the engine builder’s reliability and performance specification, the diesel fuel injection pump is subjected to stringent quality inspections and test and precise settings and adjustments. It is quite possible to manipulate the latter on an engine to obtain increased power. However, it should be clearly understood that such tampering is done at the owner’s risk, and often with disastrous consequences to his equipment.