M-12071-A50 REVISION 2 Multiport EFI Engine Management Wiring Harness M-12071-A50 REVISION 2 Installation Manual TABLE OF CONTENTS Section 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 Topic Page Introduction ....................................................................................2 Overview .........................................................................................2 Additional Necessary Ford Sensors and Components.............. 2-3 Tools Required ...
M-12071-A50 REVISION 2 NOTES -1- Ford Racing Technical Support (800)FORD-788
M-12071-A50 REVISION 2 1.0 INTRODUCTION This wiring harness kit is offered to allow Ford performance enthusiasts to take advantage of fuel injection technology with ease and simplicity. This harness includes numerous features intended to simplify the installation process. This harness kit is primarily intended for use on 5.0L (302) and 5.8L (351) engines, but will also fit 429/460 engines if used with the proper distributor and throttle body.
M-12071-A50 REVISION 2 (Continued) 3.2 Fuel Injector - F1ZE-9F593-C2A, 19 Lb/Hr Many Ford 302/351 fuel injected engines are factory equipped with a set of 19# Fuel Injectors, which will safely support approximately 275 HP. If you have made horsepower improvements, you will need to consider larger fuel injectors. 3.3 Mass Airflow Sensor - F1ZZ-12B579-AA If you choose a larger injector than the factory 19 lb/hr, you will need an aftermarket mass air meter calibrated for that size injector. 3.4 3.
M-12071-A50 REVISION 2 4.0 TOOLS REQUIRED In addition to a common assortment of sockets, wrenches and screwdrivers, you will need the following: A. B. C. D. E. F. G. 5.0 Wire Strippers Digital Volt/Ohm Meter Solder Gun / Solder Electrical Tape / Shrink Tubing Drill Motor 2.5” Hole Saw Utility Knife PRE-INSTALLATION OF HARNESS AND PARTS 5.1 Disconnect the battery prior to doing any wiring!! 5.
M-12071-A50 REVISION 2 6.0 HARNESS WIRE COLORS AND CONNECTOR LOCATIONS BK = Black BR = Brown DB = Dark Blue DG = Dark Green Connector # GY = Gray LB = Light Blue LG = Light Green O = Orange Connects to PK = Pink P = Purple R = Red T = Tan W = White Y = Yellow Wire Colors 1................................ Fuel Injector #1……………………………….. R, T 2……………………… Fuel Injector #2……………………………….. R, W 3……………………… Fuel Injector #3……………………………….. R, BR/Y 4……………………… Fuel Injector #4………………………………..
M-12071-A50 REVISION 2 6.
M-12071-A50 REVISION 2 7.0 HARNESS INSTALLATION . 7.1 Lay the harness onto the lower intake manifold being careful to position it according to the layout of the engine. Fuel Injectors #1, 2, 3, and 4 are on the right (Passenger, USA) side of the engine compartment. You may attach the fuel injector connectors at this time. 7.2 Attach the connector for the TFI Module located on the distributor. (Page 6, Connector #15) 7.3 Attach the connector for the ACT Sensor.
M-12071-A50 REVISION 2 7.9 Route the EEC Harness 60-Pin Connector, the 9-Pin Connector, the Inertia Switch Connector, the Self Test Connector, and the FRCM Connector through the hole in the firewall referred to on Page 4 (Sections 5.6 – 5.8). Place the grommet around the harness and carefully position the groove of the grommet so that it ‘straddles’ the sheet metal in the hole of the firewall. Do NOT attach the 60-Pin Connector to the computer at this time.
M-12071-A50 REVISION 2 7.14 As previously stated, this harness is designed to mount the computer in the passenger side kick panel. If space is tight, you may choose to mount the computer under the dash. NOTE: The computer should be mounted with the connector located at the bottom to avoid trapping water. 7.15 Once you have determined a suitable location to mount the computer, you may attach the 60-Pin connector using a 10mm socket.
M-12071-A50 REVISION 2 8.0 WIRING CONNECTIONS This harness has been designed to simplify the installation process of fuel injection. There are numerous enhancements intended to require minimal effort by the installer. With the exception of the main battery leads, all of the required harness connections have been located in a central location within a single 9-Pin Disconnect located near the computer.
M-12071-A50 REVISION 2 8.3 The final connections to be made will be the Main Power Supply and the Ground Wire. This harness has been designed for use with the battery mounted in the front of the engine compartment on the Left (Driver, USA) side. If your battery is in a different location, you should lengthen these wires using a 10 gauge wire and run them DIRECTLY to the battery. These extensions should be soldered.
M-12071-A50 REVISION 2 9.0 Enhanced Features This harness has been carefully designed and developed primarily off of feedback derived from performance enthusiasts who wanted a simple, yet fully functional, wiring solution for their Street-Rods. A lot of careful thought and effort has been utilized to make this harness very simple to install. One heavily favored option is that all necessary relays and fuses have been packaged into a single location, referred to as the Fuse Relay Control Module.
M-12071-A50 REVISION 2 D. Optional Electric Cooling Fan Control, By default, the factory Ford computer (PCM) has no provisions to control an electric cooling fan. However, some aftermarket ‘chip’ tuners are able to introduce this function via pin 41 at the PCM, which is normally an unused pin. If you will be using a 'chip-tuned' PCM to control an electric cooling fan, you will need to attach the 10ga Orange wire (Page 6, Item #30) to the 12V+ side of the electric cooling fan.
M-12071-A50 REVISION 2 10.0 INITIAL START UP The following information is offered assuming you have adhered to each of the previous steps of this installation manual. This would include making certain that the main power leads are hooked up, the PCM & FRCM are connected, and all of the required connections within the ‘9 Pin Disconnect’ have been made. 10.1 Check all fluid levels, electrical and fluid connections.
M-12071-A50 REVISION 2 (Troubleshooting - Continued) 11.4 Verify that you have connected the black ground wire (Page 6, Connector #17) DIRECTLY to the negative side of the battery. Do NOT attach this connection to any other ground source. The entire EFI system is dependent upon this ground. Be sure to solder any splices that may have been required if this connection needed to be lengthened. 11.5 Inspect the engine for vacuum leaks.
M-12071-A50 REVISION 2 12.
M-12071-A50 REVISION 2 66 - C MAF circuit below minimum voltage 67 - O Park/Neutral Position (PNP) switch circuit open - or A/C ON during Self-Test 77 - R Brief WOT not sensed during Self-Test/Operator error 79 - O A/C on/Defrost on during Self-Test 81 - O Secondary Air Injection Diverter (AIRD) solenoid circuit failure 82 - O Secondary Air Injection Bypass (AIRB) solenoid circuit failure 84 - O EGR Vacuum Regulator (EVR) circuit failure 85 - O Canister Purge (CANP) circuit failure 87 - O,C
M-12071-A50 REVISION 2 13.
M-12071-A50 REVISION 2 14.0 ELECTRICAL SCHEMATIC - 5.
M-12071-A50 REVISION 2 15.
M-12071-A50 REVISION 2 16.0 MISCELLANEOUS PARTS LIST Description Part Number Starter Solenoid (Diode Suppressed) ……………………………….. E9TZ-11450-B Ignition Coil ...………………………………………………………….. E73Z-12029-A Fuel Rail, 5.0L …………………………………………………………. F2ZZ-9F792-AS Fuel Rail, 5.8L …………………………………………………………. F2TZ-9F792-C Fuel Filter ………………………………………………………………. E7DZ-9155-A Barbed Fuel Filter Fitting (5/16”) ……………………………………... N806187-S190 Barbed Fuel Filter Fitting (3/8”) ……………………………………….
M-12071-A50 REVISION 2 NOTES Ford Racing Technical Support (800)FORD-788 - 22 -
Print Revision: Nov-2012
