Fuel Pump: Description and Operation

On the 2.3, 3.3, 4.2, 5.0, 5.8L engines, the fuel pump is bolted to the front cover or left side of the cylinder block. The fuel pump is located on the right front cover of the 3.8L V-6 engine.

Fuel Pump Rocker Arm and Cam Eccentric - 3.3L Engine:

It is mechanically operated by an eccentric on or bolted to the end of the camshaft. The pump rocker arm riding against the eccentric provides the diaphragm up and down pumping motion.


The pump must be replaced if testing indicates it is not within performance specifications. IT CANNOT BE DISASSEMBLED.

NOTE: The fuel pump has a rollover check valve to meet Federal Motor Vehicle Safety Standards (FMVSS). Service replacement fuel pump must meet this requirement.