UAFS Wiring Guide 2016-2018 Focus RS

EMS Port Injection UAFS Wiring Guide 2016-2018 Focus RS – Jessie Ringley

This set of wiring diagrams is a detailed guide for installing the EMS Ultimate Aux Fuel System (UAFS) on a 2016–2018 Ford Focus RS. It outlines how to properly connect power, ground, sensors, and injector control wires to the factory harness using specific connectors (C1045, C1551B, and C1551E). The guide shows where to tap for safe 12V+ power, how to wire the relay trigger and ground, and how to connect key inputs like the MAP sensor, crank and cam position sensors, flex fuel sensor, and the accelerator pedal. It also includes injector pin assignments and instructions for removing unused wires to avoid interference. Overall, the purpose is to ensure clean integration of the UAFS with the OEM ECU and harness, supporting additional fuel delivery for high-performance or ethanol-tuned EcoBoost builds.

This set of wiring diagrams is a detailed guide for installing the EMS Ultimate Aux Fuel System (UAFS) on a 2016–2018 Ford Focus RS. It outlines how to properly connect power, ground, sensors, and injector control wires to the factory harness using specific connectors (C1045, C1551B, and C1551E). The guide shows where to tap for safe 12V+ power, how to wire the relay trigger and ground, and how to connect key inputs like the MAP sensor, crank and cam position sensors, flex fuel sensor, and the accelerator pedal. It also includes injector pin assignments and instructions for removing unused wires to avoid interference. Overall, the purpose is to ensure clean integration of the UAFS with the OEM ECU and harness, supporting additional fuel delivery for high-performance or ethanol-tuned EcoBoost builds.

This set of wiring diagrams is a detailed guide for installing the EMS Ultimate Aux Fuel System (UAFS) on a 2016–2018 Ford Focus RS. It outlines how to properly connect power, ground, sensors, and injector control wires to the factory harness using specific connectors (C1045, C1551B, and C1551E). The guide shows where to tap for safe 12V+ power, how to wire the relay trigger and ground, and how to connect key inputs like the MAP sensor, crank and cam position sensors, flex fuel sensor, and the accelerator pedal. It also includes injector pin assignments and instructions for removing unused wires to avoid interference. Overall, the purpose is to ensure clean integration of the UAFS with the OEM ECU and harness, supporting additional fuel delivery for high-performance or ethanol-tuned EcoBoost builds.

Jessie Ringley

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