PN29929 Datasheet, PDF (1/2 Pages) Mallory performance club – Fuel Pressure Regulator

Fuel Pressure Regulator
PN 29929
INSTALLATION
Mallory's 4213 Adjustable Fuel Pressure Regulator is designed to be a bolton replacement for the
OEM Ford 1994-1998 5.0 and 4.6 fuel injection regulator (except 1998 SOHC). The Mallory Regulator
is installed in the same manner as the factory Ford regulator (see repair manual). Be sure to lubricate
the O-rings with a drop or two of motor oil before installation.
VACUUM PORT
A vacuum line is connected to the stock
regulator. This vacuum line should be
connected to the vacuum port on the
Mallory regulator to reduce fuel pressure
at idle and part throttle.
ADJUSTMENT SCREW
JAM NUT
SETTING THE PRESSURE
Factory Ford regulators produce about 35-
40 psi at full throttle. The Mallory regulator
is factory set at about 45 psi. Adjust the
pressure by loosening the jam nut and
GAUGE
PORT
VACUUM PORT
turning the adjustment screw (clockwise
increases pressure). The full throttle
pressure can be adjusted between about
30 and 75 psi. The ideal pressure depends
on many variables. On a mostly stock
engine, a slightly higher pressure (about
45 psi) will usually result in a slight power
GASKET
O-RINGS
increase. Modified engines may require
higher pressures to optimize power output.
If a pressure over 60 psi is required to optimize power output, larger injectors should be considered.
FUEL PRESSURE GAUGE PORT
A 1/8 NPT port is tapped into the side of the Mallory regulator housing. The port is supplied from
Mallory with a plug. If a fuel pressure gauge is used, the plug can be removed and the gauge connected
to the port.
REBUILDING
See Figure 2 If the regulator develops a leak or the pressure begins to fluctuate, rebuilding may be
necessary. A rebuild kit is available (Part No. 3162). This kit includes a new diaphragm assembly,
sealing washer, gasket and O-rings. The diaphragm and sealing washer can be replaced without
removing the regulator housing.
REPLACING THE DIAPHRAGM AND SEALING WASHER
Remove the nut and adjustment screw. Remove the three upper screws. Remove the cap, thrust
washer, springs, diaphragm assembly and the sealing washer. Install the new sealing washer and
diaphragm assembly. Re-install the springs, washer, and cap. Re-install the three screws. Great care
must be taken to tighten the screws gradually and evenly so that the cap stays flat with the housing.
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