Nitrous Express ELECTRONIC FUEL INJECTED FR-S/BRZ PLATE SYSTEM User Manual
Page 5
6. Using the 18-ga. wire supplied with the system, connect the remaining wide-open throttle terminal to
the “Red” wire on the supplied heavy duty relay. (See wiring diagram).
7. Use the red 12-ga. wire to connect the “BAT” terminal of the alternator or to the + post on the vehicle
battery, to the “Black” wire on the heavy duty relay. (If desired a 40 amp fuse may be installed here)
8. Attach one wire from each of the solenoids to the “Green” wire on the relay. Note: These coils are
direct current and it does not matter which wire is used. Now attach the two remaining solenoid wires
to a good ground.
9. Attach the “White” wire from the relay to the fuel safety switch (if you are using one) (PN 15718)
terminal marked NO. Using the 18-ga. blue wire, attach the other terminal on the safety switch marked
(C) to ground. (See wiring Schematic) Note: If a fuel safety switch is not used simply attach the
“White” wire on the relay to ground.
10. Reconnect the battery cable.
11. At this point both solenoids should be tested for proper operation. Note: (Be sure the nitrous bottle is
off and there is no pressure in the N2O supply line). If you are using a fuel safety pressure switch you
must use a jumper wire between the NO and C terminals when testing the solenoids. To test, turn the
“arming” toggle switch to the ON position and push the “activating” wide-open throttle switch. A
clicking sound should be heard as the solenoids open. IMPORTANT: Make sure that both of the
solenoids are clicking! If no sound is heard or only one of the solenoids is working, check all wire
connections and the wiring schematic for proper connections.
12. With all components mounted, feed line and electrical connections completed, connect the nitrous
supply line to the bottle and FULLY open the bottle valve and carefully check connections on the
nitrous side of the system for leaks and retighten fittings if necessary. With no leaks detected, start the
engine and thoroughly check the fuel connections for leaks. Do not attempt to start engine if nitrous
has been accidently injected into the intake manifold. Disconnect all of the coil wires and crank the
engine several revolutions with the throttle wide open to clear the engine of all nitrous before
attempting to start engine.
13.
For wiring instructions on the Auto Learn TPS sensing WOT switch please see
instructions.
After a complete check and verification of all components of the system for proper installation and
operation it is time to have some fun.