V-10, V - 8 – Vortech 1999-2001 Ford 5.4L/6.8L Super Duty/SUV User Manual

Page 20

P/N: 4FT020-010

FUEL MANAGEMENT UNIT (FMU) INSTALLATION

A. Using a 3/8" springlock disconnect tool, discon-

nect the fuel return line at the back of the engine
on V-10 models (See

Fig. 8-a) or drivers side

valve cover on V-8 models (See

Fig. 8-b).

B. Following the diagram connect the 17" male

FMU inlet line to the fuel rail. Route the fuel line
to the -4 x 90

brass fitting on the FMU and

tighten.

C. Connect the 7" female FMU outlet line to the

vehicles stock return line. Route the opposite
end to the -4 straight fitting on the FMU and
tighten.

D. Position the FMU against the upper firewall

(driver’s side) directly under the plastic wire
harness cover. Mark and drill two #30 holes on
the firewall to mount the FMU. Secure with the
#8 sheet metal screws and washers provided.
(See

Fig. 8-c.)

Fig. 8-b

NOTE:

Refer to the Appendix for complete diagrams.

V-10

See Appendix A-1

for detail view.

Fig. 8-a

V - 8

See Appendix

A-2 for detail

view.

Fig. 8-c

E. Secure the fuel lines away from abrasion and

exhaust heat with the provided tie wraps.

F. Tap into the factory fuel regulator vacuum line

with the supplied 5/32" hose and TEE. Route the

new hose to the fitting on top of the FMU.

I. Remove the three screws securing the fuel

pump enclosure’s cover using a 3/16 nut-driver
and remove the cover.

J. Remove the stock fuel pump from its enclosure.

Separate the rubber pump support from be-
neath the filter and install it on the supplied
pump. Secure the support with the new filter
provided.

K. Using the supplied fuel pump, reassemble the

fuel pump assembly and canister with cap.

L. Reinstall the canister assembly into the fuel tank

and reattach the electrical connections.

M. Reinstall the fuel tank, reconnect the fuel filter

inlet line, reattach the fuel filler neck and rein-
stall the fuel cap.

N. Turn the ignition key on and check the fuel pump

for leaks.

IN-TANK FUEL PUMP REPLACEMENT (6.8L H.O. Systems Only), cont’d.