Fuel Management Unit - Ford Mustang 1986 Installation Instructions Manual

5. FUEL MANAGEMENT UNIT (skip this step for Renegade applications)
A. Relocate the relay using the stock screw.
B. Locate the fuel management unit against the inner
fender panel ahead of the shock tower about an inch
from the top. Drill holes and secure with the sheet
metal screws provided. (See Fig. 5-a.)
C. Disconnect the fuel rail return line at the rubber hose
on the engine's lower right side with a 3/8" spring
lock disconnect tool. The return line does not have
the pressure test fitting on it.
OUTLET
(FUEL FROM HERE
RETURNS TO TANK)
D. Connect the Fuel Management
unit (FMu) input hose (the hose
that goes to the 90° fitting on the
side of the FMU) to the return
line coming from the fuel rail
regulator as shown in Fig. 5-b.
E. Connect the unit's return hose
(that connects to the center
fitting) to the stock return
hose.
F. Secure the fuel lines away from
the exhaust header with the tie
wraps provided.
G. Connect the top fitting on the
FMU to the multi-branch fitting
located on the driver's side
firewall using the supplied
5/32" hose. Use the port with
the "B/R" designation. (See Fig.
5-c.)
NOTE: Add on inline fuel pump
with unit provided if
installing high output
system.
P/N: 4FA020-010
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25MAR08 v4.0(86-93 5.0 Mus (4FA v4.0))
CONNECT TO
MANIFOLD
VACUUM/PRESSURE
INLET
FUEL LINE
FROM
STOCK
REGULATOR
3
SHOCK TOWER
RELAY
Fig. 5-a
Fig. 5-b
B/R S/C
REMOVE VACUUM CAP
AND A TTACH FMU LINE HERE
Fig. 5-c
FMU