Instruction Manual

P/N: 4GL020-010
©2008 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
08OCT08 v5.0(99-07 GM Trk (4GLv5.0))
8
Fig. 8-c
3. ATTACH THE SUPPLIEDVACUUM LINE
AND TEEINT OTHE FUEL REGULATOR
MANIFOLD VACUUM LINE (LINETO BYPASS
VALV EWILL BE INSTALLED LATER)
STOCK RETURN LINE
(TO TANK)
STOCK SUPPLY
LINE (FROM
TANK)
TO BYPASS VALVE
STOCK MANIFOLD
VACUUM LINE (REMOVED
FROM FUEL REGULATOR)
FUEL PRESSURE
REGULATOR
ARROWS INDICATE THE
DIRECTION OF FUEL FLOW
F.M.U.
2. AT TACH EACH OF THE FMU LINES
TO THEIR RESPECTIVE SNAP
1. REMOVE THIS FITTING FROM THE
FUEL REGULATOR RETURN LINE
A. Mount the supplied FMU as shown in Fig. 8-a
using the existing studs on the rewall as fol-
lows:
1. Remove the nuts securing the factory
ground straps.
2. Install the FMU over the studs.
3. Loosely reinstall the nuts on top of the
FMU bracket.
B. Disconnect the fuel return line from the fuel rail
and connect the respective lines to their snap
connectors on the end of the FMU lines. (See
Fig. 8-c.)
C. Using the supplied 5/32” vacuum line and TEE,
connect the 90° tting on top of the FMU to the
manifold vacuum line connected to the fuel
regulator. (See Fig. 8-c.)
Fig. 8-a
8. FUEL MANAGEMENT UNIT (FMU) INSTALLATION (2000-2002 Models Only)
NOTE: The fuel tank return line extends from the
fuel regulator to the tank. It is smaller than
the fuel rail supply line.
NOTE: Not all vehicles have the studs in the
same location. Drill an additional 1/4”
hole in the FMU bracket as required.
See Fig. 8-a.
Fig. 8-b