Vortech 1990-1995 5.7L TBI Truck/SUV User Manual

Page 12

P/N: 4GB020-010
©2002 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
22FEB02 V1.1

(LT. TRUCK (4GB V1.1))

D. Remove the stock fuel feed line from between the

fuel filter located on the frame under the driver's
side floor and the throttle body.

E. Mount the additional fuel pump to the inner side of

the frame rail beneath the driver's side floor. Use
the shorter hose provided to help locate the pump
the correct distance from the filter. This hose has
an adapter fitting on the filter end. Secure the
pump to the frame and to the hose with the
clamps provided.

F. Mark and drill a 3/16" hole in the frame near the

fuel pump to mount relay and wiring harness.
Mount relay with supplied #10 hardware.

G. From relay terminal #85, tap the yellow wire into

the solid gray wire in the harness running along
the driver's side frame member. Use the supplied
scotchlock.

H. Connect the short red wire from relay terminal

#87 to the (+) terminal on the fuel pump.

Connect the longer black wire from the (-) termi-

nal at the fuel pump to a clean ground.

J. Connect the short black wire from relay terminal

#86 to a clean ground (relay screw mount works
well).

K. Connect the long red wire from relay terminal #30

to a (+) battery lug located in the engine compart-
ment.

L. Plumb the pump to the supplementary injectors

as per the schematic on page 5. Much of this
assembly has been completed by the Vortech
factory.

M. Plumb in the pressure regulator and return outlet

fuel to the throttle body inlet using the adapter
fitting and O-ring.

N. Mount the Vortech SFIC unit inside the panel

beneath the steering column with the Vortech
SFIC unit inside the panel beneath the steering
column with the Velcro strips provided.

O. Connect the wires for the Vortech SFIC. Attach

the black wire to ground. Connect the red to the
"4WD" fuse location in the stock fuse block (this
location is also found on 2WD trucks) with the
special adapter provided. Connect the brown
wire to the negative of the ignition coil tach
pickup.

5. SUPPLEMENTARY FUEL INJECTION COMPUTER AND

RELATED SYSTEM, cont'd.

NOTE: Make sure all small holes are lined up

and not plugged with gasket sealer when
installed.