Figure 15
Fuse
All
modifications
made
to wiring can
only be
made on
wires listed
in Wire
Chart Figure
16 on
the next page
such
as
extensions
or
cuts.
Any modifica-
tion of the ECU main
harness (see Figure
7) other than these
listed wires will result
in a VOIDING of the
FiTech EFI
warranty.
Figure 11
Figure 12
Above
-
The throttle body has four
80
-lb injectors already
installed. This arrangement will allow the system to supply enough
fuel flow for up to
65
0 HP. The
throttle body has the injector sub-
harness pre-installed and ready to go.
Wiring the EFI System
See the wire chart (Figure 1
6
on page 6) which lists each wire
in
Harness "A" that is used in the system and what it connects to.
NOTE: Typically some of the wires listed in the chart on the next
page
may need to be extended. It is strongly suggested that any
wire ex-tensions are made with the same gauge and color wire as is
used in
the supplied harness. Make connections as a soldered
joint rather
than a crimped connection. Utilize a shrink wrapped
sleeve covering
all connections.
Above
-
The CTS connector on the main wiring harness is plugged
into the Coolant Temperature Sensor in the manifold. (1/2" NPT adapter
supplied in kit)
Above
-
The supplied Coolant Temperature Sensor is threaded into
the water port in the intake manifold. Use Teflon tape on threads.
Figure 13
Figure 14
30
85
86
87
Ground
Ground
Fan
Relay
Battery
Ground
Ign/Acc
Circuit Fuse
Fan Circuit
Fan 1 - Gray Wire
See Figure 7.
C
onnect
the injector
sub-
harness onto the
main
harness
. Make sure the connectors are securely fastened.
On Engine-Adjustments
When you set idle speed, you will notice some new sounds. The first is
ticking from the injectors and it is normal. You may also hear air
whooshing or whistling at idle. Barring a vacuum leak, this is likely the
bypassed air from the Idle Air Control (IAC valve) and this is normal. The
IAC valve maintains idle speed when the AC compressor or electric fans
click on.
IAC Setup
The idle screw on the throttle body needs to be adjusted. This needs to be
set so that the IAC value is nearly closed when fully warmed up and in
idle 3-10 IAC Steps are recommended for a fully warm engine, out of gear,
at idle. When the engine is at idle, the IAC will learn the necessary position
to maintain the RPM at the Target Idle Speed. When loads are placed on
the engine or when the throttle is open, the IAC steps will move around,
this is normal. It’s best to adjust this screw from a more open position to
start with. This will allow the engine to start at a high idle, which will
make adjusting the IAC easier. Follow this procedure:
1. Start the engine and in your Handheld go under "initial set-up."
2. Go to “idle setup” and find “idle set mode” and switch to "Adjust"
3. Start the vehicle and find IAC Steps on the dashboard. This number
needs to be within 3-10 at operating temperature. If the number reads
zero then slowly turn the screw OUT (counterclock-wise) until the IAC
Steps reads between 3-10.
5
Injectors
Injector sub-harness
Injector sub harness
connector
