Vortech 1996-1998 Ford 4.6L Mustang Cobra User Manual

Page 13

P/N: 4FK020-010

24NOV08 v3.0(4.6L DOHC Cobra (4FK v3.0))

4. FUEL MANAGEMENT UNIT

A. Position the FMU onto the passenger’s side in-

ner fender and secure with the supplied sheet

metal screws (see Fig. 4-a on page 4).

B. Disconnect and discard the factory rubber fuel

return line running from the fuel rail (NOTE: the

return line DOES NOT have a pressure test fitting

on it) to the steel return line (the smaller of the

two) located behind the right side shock tower

using a spring lock disconnect tool.

C. Connect the FMU inlet hose (the hose that goes

to the 90° fitting on the side of the FMU) to the

return side of the factory fuel regulator on the

fuel rail. (See Fig. 4-b on page 4.)

D. Connect the FMU outlet hose (attaches to the

center fitting on the bottom of the unit) to the

steel return line running to the tank. Make sure

hose end is securely “snapped” onto factory fuel

return line.

E. Secure the fuel lines away from abrasion and

exhaust heat with the tie wraps provided.

F. Attach the supplied length of 5/32” vacuum

hose to the fitting on top of the FMU. Connect

the opposite end of the hose to the factory fuel

regulator vacuum connection using the 5/32”

TEE provided. Trim hose length as necessary.

A. Remove the 1/4” NPT socket head plug located

perpendicular to and directly beneath the factory

oil pressure sending unit. This is found on the

engine’s left side below the oil filter.

B. Thread the supplied 1/4” NPT #4 flare x 90° fit-

ting into the pressure sending unit mount using

engine oil on the pipe threads (see Fig. 3-a).

Teflon tape or other sealants are not recom-

mended as it might loosen and cause blockage

of the oil feed orifice, resulting in supercharger

failure. Rotate the fitting so that the flare points

toward the front of the vehicle.

C. Temporarily cap off the flare fitting to prevent dirt

from entering. The oil feed will be connected at

a later time.

1/4” npt x 90° Fitting

Fig. 3-a

NOTE: If a Vortech Power Cooler is being

installed at the same time as the su-

percharger system, refer to the Power

Cooler Installation Manual for the proper

FMU mounting location.

3. OIL FEED (ENGINE OIL-FED APPLICATIONS ONLY. APPLICATIONS WITH V-3

SUPERCHARGERS SKIP AHEAD TO STEP 4)