Installing Advanced Fuel Dynamic’s PROFLEX DX Adaptive Flex Fuel System on a 2022 Mustang GT
Ford’s high-tech 5.0L engine features port fuel injection and direct injection, and makes 450 horsepower at the crank from the factory. This example has been upgraded with an aftermarket air filter system, headers, and exhaust.
Gear heads have been looking for ways to make affordable horsepower since the internal combustion engine roared onto the scene more than 100 years ago. Some have experimented with fuel additives and other clever ways to enhance fuel delivery, but those experiments were often at the expense of their engine’s longevity. Luckily, we’re living in an age where factory-fresh vehicles operate very efficiently, which provides the end user with excellent fuel economy and aggressive performance.
Even with these advancements from the OE’s, there is still room for improvement, especially when you consider the availability of E85 fuel. That’s where the folks at Advanced Fuel Dynamics come into the picture, with kits that can make nearly any vehicle compatible with E85 fuel.
Our starting point is a mildly modified 2022 Ford Mustang GT, which features Ford’s high-tech 5.0-liter V8. On the baseline pull, the car put down 440 horsepower on RM Motor Werks’ chassis dyno, using 93-octane pump gas.
These adaptive flex fuel kits unlock hidden horsepower and allow for any mixture of ethanol fuel without the risk of harming your engine. There is no tuning or re-tuning necessary for different octane or ethanol blends—it adjusts on the fly. The kit uses an OE-style fuel content sensor to detect the amount of ethanol passing through the fuel lines. Then, the sensor communicates with a control module to actively adjust fuel injector pulse rates to accommodate the ethanol percentage.
The Advanced Fuel Dynamics PROFLEX DX system includes this Port Commander Module. The module communicates with the port fuel injectors to determine the proper pulse rate that coincides with the ethanol percentage.
This OE-style fuel content sensor comes with the kit and features original style fuel line fittings to make installation fast and easy. A simple wiring connection allows the sensor to communicate with the Port Commander Module and the Direct Commander Module.
A new piece that’s included in the PROFLEX DX system is this Direct Commander Module. Since this Mustang features a port fuel injection system and direct injection, this secondary module is necessary for proper fuel delivery.
Advanced Fuel Dynamics has developed kits for many makes and models, and our focus today is installing a PROFLEX DX Adaptive Flex Fuel System on a 2022 Ford Mustang GT Premium. This car already makes great horsepower in an efficient manner, but the added octane and lower temperatures of E85 fuel will allow the factory ECU to add ignition timing and make more power. This affect is much greater on boosted applications, as the extra octane and cooler temperatures allow for more boost and timing.
The wiring harness in the PROFLEX system features simple plug-and-play connections into the fuel content sensor and dual Commander Modules. Only one wire needs to be spliced into the factory ECU harness, and we’ll cover that in this article.
This fuel injector harness is included in the kit, but it does not replace your original harness. Instead, these connectors plug into the original injectors, and then a second connector plugs into the original harness.
Advanced Fuel Dynamics offers kits that work with port fuel injection as well as direct injection. This Mustang features port injection and direct injection from the factory, and the PROFLEX DX kit has the necessary components to work with both injector systems. The kit includes a Port Commander Module, a Direct Commander Module, fuel content sensor, wiring harness and pre-assembled braided fuel lines with factory-style locking connections.
Joey Bolden at RM Motor Werks in Knoxville, Tennessee handled the install on this late model Mustang. RM Motor Werks has a chassis dyno, which allowed us to get before and after horsepower numbers. The kit only takes about an hour to install and requires no custom tuning. Simply install the kit and the factory ECU immediately starts communicating with the Advanced Fuel Dynamics system to deliver more horsepower. In our case, the Mustang gained 14 horsepower at the wheels with an ethanol percentage of 60 percent. Higher percentages of ethanol would obviously provide higher horsepower numbers, and a custom tune to account for headers, exhaust and other modifications would yield even greater results. But for an affordable kit that installs in an hour, we couldn’t be happier to find some hidden horsepower with E85 fuel in this S550 Mustang.
As with any project that involves a vehicle’s electrical system, the first step is to remove the negative battery cable. Depending on the desired placement of the Commander Modules, you may also want to remove the battery completely to access the firewall.
Joey Bolden at RM Motor Werks is handling the PROFLEX install on this S550 Mustang. He begins by laying out the injector wiring harness.
The injector harness is a very simple install. In fact, it typically takes more time to lay it out and tuck the wires than it does to actually plug in the connectors.
Next is the fuel content sensor install. Using a disconnect tool, Joey disconnects the original fuel line from the engine and then disconnects the line at the firewall bulkhead. Since the fuel system is under pressure, a small amount of fuel may spray from the connection points when they are disconnected. Keep the rag underneath the fuel line in case any fuel drips out during installation.
The original fuel line is removed and can be discarded. The PROFLEX system features two new fuel lines with factory-style locking connections. One line runs from the firewall bulkhead to the fuel content sensor, and the second line runs from the sensor to the engine.
The new braided fuel hoses simply push onto the original lines for an easy installation. One fuel hose features two straight fittings, while the other features one straight and one 90-degree fitting.
Joey positions the fuel content sensor beneath the chassis bracing for easy access. Since this sensor is very light, it does not need to be securely mounted to the car. Notice the 90-degree fitting on the hose that connects the sensor to the engine. This makes for a clean install.
Then, it’s a simple task of plugging the harnesses together and connecting it to the fuel content sensor.
In order to tie into the car’s ECU wiring harness, Joey removes the large connector that resides under the fuse panel. A pick tool is used to open the connector and gain access to the bundle of wires.
Some of the original wrapping and loom is removed to get a little more room to work. Then, Joey finds the blue and brown wire on Pin 71. This is the wire that needs to be cut.
After confirming the wire and pin location, Joey cuts the wire about four inches from the connector. He then strips about an 1/8-inch of insulation off the wire.
A female pigtail connector is included in the PROFLEX harness and it is attached to the blue and brown wire, on the ECU side. The male connector with a purple wire is plugged into this pigtail.
Heat shrink tubing is used to protect the soldered or crimped connections from corrosion.
Joey connects the other side of the cut wire to another pigtail connector, supplied with the kit and protects the connection with heat shrink tubing. Then, he plugs the connection into the female connector with a green wire.
The ground wires in the PROFLEX wiring harness can be attached to an existing ground connection on the car. Be sure to clean the surface before re-installing the bolt.
After routing the wiring harnesses and finding a home for the two modules, Joey plugs the harness into the Port Command Module.
3M double sided tape is used to attach the two modules to the location of your choosing. In the case of this S550 Mustang, the areas near the battery box made the most sense. You want the modules to be mounted in a dry place, away from extreme heat.
The same process is completed for the Direct Command Module. The connector simply snaps into place.
Clean the area thoroughly before attaching the modules. Finally, tidy up any wiring and be sure that none of the wiring or connections are near extreme heat.
With the Advanced Fuel Dynamics PROFLEX kit installed, all that’s left to do is add some E85 fuel to the tank. This car already had a few gallons of 93-octane gas in the tank, but the good news is that this adaptive flex fuel system constantly adjusts for any amount of ethanol.
After cranking the car and getting it up to temperature, Joey used the PROFLEX Connect app on his phone to see the real-time ethanol content. Due to the leftover 93-octane gas, we ended up with a 60 percent ethanol reading.
By 
