FAQ Group: FAQ
2018 Focus ST
The 4 yellow wires with black stripes will tap into the coil pack outputs at pins 42,43, 57, and 72 on the c1381E plug (if you are unsure which one that is, check a couple pins and confirm the wires match the colors noted below). It doesn’t not matter which of the yellow wires go to which output, only that they each go to their own output.
The green wire will tap into pin 33 on the c1381E plug.
The red wire will need 12 V+ and the black wire will need to be grounded. There are many ways to do this, including using a make-a-circuit to tap into the fuse box.
2013 Focus ST
The 4 yellow wires with black stripes will tap into the coil pack outputs at pins 69,70, 93, and 94 on the c1381E plug (if you are unsure which one that is, check a couple pins and confirm the wires match the colors noted below). It doesn’t not matter which of the yellow wires go to which output, only that they each go to their own output.
The green wire will tap into pin 83 on the c1381E plug.
The red wire will need 12 V+ and the black wire will need to be grounded. There are many ways to do this, including using a make-a-circuit to tap into the fuse box.
Focus RS
The 4 yellow wires with black stripes will tap into the coil pack outputs at pins 42,43, 57, and 72 on the c1926E plug (if you are unsure which one that is, check a couple pins and confirm the wires match the colors noted below). It doesn’t not matter which of the yellow wires go to which output, only that they each go to their own output.
The green wire will tap into pin 33 on the c1926E plug.
The red wire will need 12 V+ and the black wire will need to be grounded. There are many ways to do this, including using a make-a-circuit to tap into the fuse box.
2021 HPP Mustang
The 4 yellow wires with black stripes will tap into the coil pack outputs at pins 45,58, 59, and 60 on the c1551E plug (if you are unsure which one that is, check a couple pins and confirm the wires match the colors noted below). It doesn’t not matter which of the yellow wires go to which output, only that they each go to their own output.
The green wire will tap into pin 53 on the c1551E plug.
The red wire will need 12 V+ and the black wire will need to be grounded. There are many ways to do this, including using a make-a-circuit to tap into the fuse box.
How to install Aux Fuel Adapter and Rail
To finish the hardware install, you will need to disconnect the oem fuel line connection at the firewall where the fuel line comes from under the car to the high-pressure fuel pump. Note, on a Mustang you will need a 3/8 inch fuel line disconnect tool, and for a Focus you will need a 5/16 inch fuel line disconnect tool.
6) Using the disconnect tool, pop the line apart and install the fuel line T fitting back onto the line then reconnect the OEM fuel line to the top of the T fitting. Note, be sure to make sure all fittings on the T are tight, including the 1/8 npt fitting on the back of the T.
![20160818_210216[1].jpg](https://lh6.googleusercontent.com/tVn6yIOziSuBdJKtbUcpx3U1RCv8OJLEwK9NHHwIC0Qf4z1HQsAmrJ0m4VS8uI6M94cV72Oy8Y3vyV1Mc9nT4vHDa_rCye7C2lDt-gT3kRMYk3Px21YIS5A6JJnxrcBbAf5YFQNXOhucCn8SneDGRe4)
7) Next, connect the provided line to the T fitting and the fuel rail. Make sure all fittings are tight, pressurize system by turning the key on, and check and address and leaks.
8) Wire up the Split-Second Controller (SSC) using the correct wiring diagram found in the FAQ section of our website.
Note, the SSC does not come with a 0 map loaded on it. If you plug in the port injectors before getting a base file from your tuner, the injectors will be firing at idle which will make the car extremely rich and undriveable. Always load a base map into the SSC before plugging in the port injectors.
2018 Mustang
The 4 yellow wires with black stripes will tap into the coil pack outputs at pins 45,58, 59, and 60 on the c1551E plug (if you are unsure which one that is, check a couple pins and confirm the wires match the colors noted below). It doesn’t not matter which of the yellow wires go to which output, only that they each go to their own output.
The green wire will tap into pin 53 on the c1551E plug.
The red wire will need 12 V+ and the black wire will need to be grounded. There are many ways to do this, including using a make-a-circuit to tap into the fuse box.
2015-2017 Mustang
The 4 yellow wires with black stripes will tap into the coil pack outputs at pins 42,43, 57, and 72 on the c1551E plug (the top most plug on the ECU). It doesn’t not matter which of the yellow wires go to which output, only that they each go to their own output.
The red wire will need 12 V+ and the black wire will need to be grounded. There are many ways to do this, including using a make-a-circuit to tap into the fuse box.
