FiTech 40003 Instrukcje instalacji - Strona 3

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so the ground wire makes contact with bare metal.

Wiring the Command Center

Your FiTech EFI system has a large orange wire that is

part of the group of wires from the ECU. This wire has to

be connected to the positive (+) terminal on the Com-

mand Center. Do not connect this wire to Command Cen-

ter after the proper length has been determined. The

system must be primed before this wire is connected oth-

erwise you risk damaging the pump. Place some tape

over the exposed end of the wire to avoid accidental con-

tact with a metal surface.

Plumbing the Stock Fuel Pump to the Command Center

Some stock pumps have a steel tube as the pump outlet.

If your pump is so configured you can slip one end of the

supplied -06 hose over the tube and secure it with a hose

clamp. Other style pumps have a threaded port for the

outlet. If the port has a fitting that has a barbed end where

a stock fuel hose is clamped to it, you can use that fitting.

If your pump has a hard line coming from the outlet port

of the pump, remove the threaded fitting and replace it

with a steel adapter fitting. There are two fuel pump

adapter fittings available. They both provide a male -06

AN thread that you can connect a fuel hose to with one

of the supplied -06 hose ends. The fitting with 1/2-20

threads fits Ford, Chrysler and pre-1970 Chevys. The fit-

ting with 5/8-18 threads fits 1970 and later Chevys. Edel-

brock pumps may require a special adapter fitting

(available from Russell Performance).

If your pump has an outlet port with 3/8-NPT or 1/2-

NPT ports you will need to acquire an adapter fitting with

those threads on one end and -06 AN threads on the

other. Adapter fittings are available from any fitting sup-

plier such as Russell, Earl's or Aeroquip.

Plumbing the Command Center to the Throttle Body

You have previously determined the lengths required for

the hoses from the Command Center to the Fuel Filter

and from the Filter to the Throttle Body. Install those

hoses.

The supplied fuel filter is light enough that it's weight

can be supported by the fuel hose. However, you can se-

cure it with an Adel clamp or a tie wrap if desired. (Clamp

or tie wraps are not included in this kit.)

Fuel Pressure Regulator

The Command Center has a built-in fuel pressure regu-

lator mounted on the top. This regulator is not adjustable

but is pre-set to provide 58 PSI of fuel pressure to the

EFI system. The regulator has a vacuum nipple on it.

When the Command Center is used with a Fitech Go EFI

System, this nipple is left open unless you are using the

Command Center on an engine with a blow through su-

percharger or turbocharger. In that case a vacuum hose

should be run from the regulator to non-ported vacuum

nipple on the throttle body. See Figure 2.

The Command Center can be used with any fuel in-

jection system. Depending upon the design of the unit

being used, different connections need to be made to the

vacuum nipple on the regulator. If the throttle body in the

system you are using has the injectors under the throttle

plates, you need to connect a vacuum hose to a ported

nipple on the throttle body. If the injectors are above the

throttle plates, leave the nipple open. On a port injection

system where the injectors are in the manifold, connect

a vacuum line to a ported nipple on the throttle body. On

an engine with a Roots supercharger a vacuum connec-

tion should be made between the regulator and the throt-

tle body if the injectors are under the throttle blades. If

the injectors are above the throttle blades (which includes

FiTech EFI systems) then leave the nipple port on the reg-

ulator open.

Note that 43.5 PSI (3 BAR) regulators are available

from FiTech when the Fuel Command Center is used with

other aftermarket EFI systems that require this type of

regulator.

Fuel Pressure Gauges on Sump Tank

The inlet gauge will show you the fuel pressure coming

from your stock fuel pump. Do not use a pump that puts

out more than 8 PSI. If your input reading is more than

8 PSI you will need to install a fuel pressure regulator be-

tween the fuel pump and the Command Center. The outlet

gauge will show you the fuel pressure being supplied to

the EFI which will be in the 58 PSI range.

Priming the Command Center

Reconnect the negative battery cable. Do not connect the

Fuel Command Center orange wire at this time. This is to

avoid having the engine start during the priming proce-

dure. Turn ignition key to the "ON" position and crank for

ten seconds. Turn key to the "OFF" position and wait 30

seconds. Repeat this procedure a second time to fill the

sump tank. This procedure allows your stock fuel pump

to pump fuel to the Command Center but the Command

Center is not pumping fuel to the EFI throttle body.

Check entire fuel system for any leaks before attempt-

ing to start the engine.

1. Be sure to install a carburetor style fuel filter

between the stock fuel pump and the Fuel

Command Center.

2. Do not conect orange wire until Command

Center has been primed. CAUTION - Live wire.

3. Check all connections for leaks.