Nissan 240SX Information – Apexi S-AFC Installation Guide

This page provides detailed instructions for installing a Apex’i S-AFC in a 1991-1994 Nissan
240SX.

Apex’i Super Air Fuel Controller: The Apex SAFC allows you to control
how much fuel will be delivered at certain rpms. This unit is mainly used
for people who have changed either there MAF, injectors or cams. For best
results this should be tuned using a dyno to insure proper settings. It provides many display
modes such as RPM and Throttle % as well as having three brightness settings
for optimal viewing.

• Electrical Tape
• 10mm Socket
• Phillips Screwdriver
• Wire Striper

Tap Connectors (Optional)

Installation:

• Disconnect Negative Battery Terminal

Remove 3 Screws on Passenger Side Kick Panel

Remove Clear Cover That Snaps on Over The ECU Main Wiring Harness

Remove The ECU Wiring Harness From The ECU by Using The 10mm Socket

I used a tap to connect my wires to my ECU, the tap allowed me to install
my afc without cutting any wires on the main harness for the ECU(see picture
of tap below).

Installation Instructions:

• Proper Wire Range (19-26 Gauge)
• Without cutting conductor, place unstriped run-wire inside run channel.
• Be sure tap wire is evenly cut. Push lightly on wire until it is as far inside the opening as possible.
• Use pliers to press down on connector cap until flush with the body if the connector.

NOTE: Wires should not be twisted after the connectors have been installed.

During Installation ECU Picture:

Completed ECU Picture:

Monitoring Choices:

Analog View of RPM and Throttle:

Analog View of RPM and Throttle with Graphic Equalizer: