Quick Fuel Technology Qfi Electronic Fuel Injection System - Manual (Page 12)

12
PHASE II: Install wiring harness into vehicle wiring
The next phase of the installation process for the Qfi system is connecting the components you have
previously installed to the vehicle’s electrical system. Thanks to the Qfi wiring sub-harness, this process
should be relatively simple.
The Qfi system wiring harness has an 8-pin watertight electrical connecter with eight wire leads
attached. You will need to have additional wire and connectors to connect four of these wires to their
appropriate connections. It is important to be certain the wires you are connecting to the sub-harness
leads are the same gauge.
Soldering the appropriate wire on the harness to its correct location, and protecting the connection with
heat shrink tubing is highly recommended for making these connections. While crimp-style butt
connectors may work, they can often make poor connections and may not make a good connection that
will maintain the proper electrical flow to the system.
The main wiring harness has 11 leads, which are clearly labeled. In case the labels come off, the colors
are as follows:
*
Heavy gauge Red -- BAT POSITIVE – 16 gauge – to Battery positive ( + ) terminal
* Black/Black 2 Harness w/ loop connector – Ground to ( - ) battery terminal
* Yellow – FUEL PUMP POS – 18 gauge – to ( + ) RED terminal on fuel pump
* Pink -- KEY POS – 20 gauge – to the Ignition Key/Crank terminal
** Green – Tach In – 20 gauge – HEI/Ready to Run Distributor, Ignition coil ( - ) terminal; Tach output of
CDI/MSD box on a No-Points distributor (either magnetic pick up or crank trigger wheel)
** Brown w/ female spade connector – 20 gauge – Coil Drive
** Orange – 20 gauge – Fan 1
** White – 20 gauge – Fan 2
** Green / Violet 2 wire harness – To Locked Distributor
* Black/ Pink 2 wire harness – To HANDHELD
* Black/ Orange / Green / Grey / Blue 5-wire plug harness – Oxygen Sensor
* THESE MUST BE CONNECTED IN ALL IGNITION APPLICATIONS!!
** These may or may not be used
NOTE: The Qfi system CANNOT be used with a basic, points distributor ignition system. Depending
upon the ignition system, there may be one or more wire leads that are not used, which should have the
ends sealed with electrical tape then doubled over and sealed with heat shrink tubing. The extra leads
should be coiled up and secured with cable ties. The extra leads should not be cut off, in case you
decide to use a different type of ignition system in the future.
Step 1:
Connect the RED (16 ga.), 12V fused wire directly to the positive
battery cable (disconnected).
Step 2
: Connect the YELLOW wire marked with the “PUMP” label to the
positive (RED) side of the electric fuel pump. The GROUND wire will attach to
NOTE: These wires supply ground when active. Relay required.