Fuel Pump: Description and Operation

Fuel Pump:

This fuel system uses a new design fuel tank, fuel pump and sender assembly. The plastic fuel tank has an internal reservoir in which the fuel pump and sender assembly rests. The fuel pump is mounted with its inlet at the bottom of the reservoir. This design provides for satisfactory pump operation during extreme vehicle maneuvers and steep vehicle altitudes with low tank fill levels.

The high pressure pump is capable of suppling 15.9 (29 on Supercharged models) gallons of fuel per hour at 39 psi. The pump has an internal check valve to maintain pressure in the system after the vehicle is shut down. The pump also has an internal pressure relief valve is used to provide overpressure protection in the event the fuel flow becomes restricted (damaged lines, clogged filter, etc.). Overpressure is restricted to 123 psi, and reduced flow will result.

The fuel pump is protected at its inlet by a nylon filter. It filters dirt and contaminants which could plug or damage the internal pump components, while at the same time allowing passage of small quantities of water which may accumulate within the fuel tank reservoir.