High pressure fuel pump location
Fuel Pump Control Wiring Circuit
Gauges Wiring Circuit
Fuel Tank Selector Valve
In Tank fuel pump(s) do not operate - 6 port fuel selector valve with hot fuel handling - Diagnostic flow chart
"An in-line reservoir has been included in the fuel system. Under normal operating conditions, valving in the in-line reservoir allows the high-pressure pump and engine to be supplied with fuel directly from the tank while return flow is routed directly back to the tank. When the pick-up is again submerged, normal operation resumes. The dual function reservoir combines the function of the reservoir with the function of a mechanically actuated selector valve.
Fuel selector valve/dual function reservoir. Vehicles with dual tanks have three electric fuel pumps. Two low pressure in-tank fuel pumps located in both the front and rear tanks, pump fuel into a reservoir. A high pressure in-line fuel pump than takes the fuel from the reservoir to the fuel injectors. This system can draw fuel from either the front or rear fuel tank unit. With the ignition in START or RUN, current flows through a fuse link to the fuel pump relay. The dual function reservoir replaces the six port selector valve on fuel injected dual tank vehicles. The dual function reservoir switches the tank from which the engine draws fuel mechanically, instead of electronically.
The dual function reservoir operates as follows: Fuel pressure created by the selected in-tank fuel pump exerts force on a 3 inch fluorosilicon diaphragm which is in turn connected to a T-bar and two shafts. This force moves the valve shaft, simultaneously opening and closing supply on the opposite side of the diaphragm, moving the valve shafts to open the alternate fuel tank ports." -@LLD@T@
As it goes with fuel - Using full
protection, plenty of ventilation
with a fan (air dilution in case of an inevitable spark) will make life "easier" and above all, have fun!