There is no denying the 6.7-liter Power Stroke engine in Ford’s Super Duty pickup is a very impressive mill for hauling and moving objects. In fact, it comes with some great specs that make it the go-to engine for many truck enthusiasts. That said, sometimes truck owners want to get a little more out of their engines. Luckily, the team at SCT Performance can help with that. However, the method of tuning might be a little different than you’re used to.
For years, simple handheld tuners were plugged into the OBD-II port and the tunes were simply “flashed” into the truck’s computer. However, recent advancements in vehicle options like Wi-Fi and Bluetooth connectivity mean that safety protocols are put in place at the factory to keep would-be hackers from taking over the vehicle.
While the ECM does not need to be removed from the truck, the three bulkhead connectors do. Simply unclip the grey clips and unplug them. Then, the SCT bulkhead plug gets connected to the ECM.
Connecting For Your Tune
While some vehicles can be tuned with the addition of a simple security bypass wire, the Ford Super Duty still presents hurdles that require a different way to tune. For these trucks, SCT has come up with a special way to tune the ’20 and ’21 Super Duty.
Currently, some tuning suppliers need you to send your Engine Control Module (ECM) to them for a tune (or tunes) to be installed. Now, uploading a custom tune is accomplished via the use of the SCT X4 hand-held controller, a power lead, and a security bypass box and wire. There is no reason to remove your ECM and have a truck that can’t be used until the “box” is sent back to you.
Tuning begins by first contacting the tuning person of your choice and then purchasing and then downloading the tune to your X4. Then the X4 is connected to the truck. The connection process is simple. Begin by disconnecting the three large connectors located on the ECM on the passenger’s side firewall. With the factory harnesses disconnected, the SCT connecting harness is plugged into the ECM and the security box. The security box connects to the X4 device, and the power lead connects to the security box and battery. From there simply upload the new engine tune parameters. If you want to return the stock tune, that is just as easy, as it is stored within the X4 device. We do need to let you know, currently, the X4 does not contain…
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