Important application notes – AEM Infinity Supported Applications - Ford Coyote Engine with Ford Racing Control Pack User Manual
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© 2014 AEM Performance Electronics
IMPORTANT APPLICATION NOTES
The coils used for testing were factory two-wire ignition coils (Motorcraft P/N BR3Z-12029-A). For
compatibility with the Infinity EMS the use of an igniter that accepts a Falling edge fire signal is
necessary. For application development two AEM 4 Channel Coil Drivers (AEM P/N 30-2840) were used.
The Ford Racing Controls Pack wiring harness includes connectors for factory LSU4.9 Wideband
Oxygen sensors (Motorcraft P/N XXXX), which the Infinity EMS does not currently support. During
application development the factory LSU4.9 sensor connectors were removed and AEM Wideband
UEGO sensor connectors were added to the Ford Racing wiring harness. These UEGO sensor
connectors are included in the AEM Universal EMS Wideband UEGO Sensor Kit (P/N 30-2002) and
information regarding how to wire the connector is provided under
Using the existing wiring harness comes with the benefit of utilizing the existing 12V supply to the
sensor through a 5 amp fuse. Another option available to the installer is the use of AEM Infinity O2
Sensor Extension Harnesses (AEM P/N 30-3600). This option involves wiring a 6-pin Deutsch connector
to the Infinity EMS to interface with the AEM O2 sensor through the extension harness without any
modification to the Ford Racing wiring harness.
The Ford Racing Controls Pack includes a Power Distribution Box containing relays for A/C, PCM,
Intercooler, Fuel Pump, Start, and Fan. With a few modifications to the harness, the Infinity will utilize all
of these relays with the exception of the A/C relay due to Ford Racing's lack of wiring to the A/C relay.
The base session provided was created with the use of the Ford Racing Mustang Boss 302 Alternator Kit
(P/N M-8600-M50BALT). The session has Lowside 0 Duty and frequency tables setup to charge at ~14.7
volts. See
in this document for more information on controlling the charging system.
The base session provided was created without the use of the Ford Racing Controls Pack air box, inlet
tube, or MAF sensor. The Factory MAF sensor is not currently supported by the Infinity EMS for airflow
calculations; however the Air Temperature sensor within the MAF has been characterized.
The base session requires a MAP sensor for airflow calculations. A custom inlet was fabricated to
replace the PCV inlet pipe into the passenger side of the throttle body assembly. A vacuum line from this
inlet to a MAP sensor was utilized.
The Ford Racing Control Pack powers the fuel pump relay any time 12V is supplied to the ‘Ignition
Switch Position’ wire. A modification can be made to the Ford Racing wiring harness to allow the Infinity
EMS to control the fuel pump and is provided under
Ford Racing Control Pack Harness Modifications
this document.
The base session utilizes the Clutch Position (Neutral Switch) flying lead on the Ford Racing wiring
harness as an input into the Infinity. Once triggered, the Infinity’s Lowside provides the ground for the
Starter Relay control circuit. If the user wishes not to provide a ground to this flying lead follow the steps
provided under
in this document to modify the Lowside.
The factory Cylinder Head Temperature sensor, Intake Air Temperature sensor, and fuel injector have
been fully characterized and their calibrations are utilized in the base session.