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Old 01-19-2017, 01:56 PM   #11
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From the internet:
"Ford began migrating brake-throttle override, or Brake Over Accelerator (BOA), as the automaker calls it, in 2004 and the first product it appeared on was the 2005 Ford Escape Hybrid. By the end of calendar year 2010, it was implemented on nearly 100 percent of Ford and Lincoln light-duty models (excluding select low volume vehicles, such as certain trucks with a Cummins diesel engine). Owners of these trucks may not want BOA because they are backing up trailers or putting boats in the water, etc.

Brake Over Accelerator is a Ford-designed system. It is on manual and automatic transmission vehicles and operates the same. BOA is also on Ford hybrid and electric vehicles but operates a little bit differently than conventional powertrain vehicles. The system works the same way but the software calibration is a little different.

The BOA system monitors the accelerator pedal and the brake pedal position. If it senses brake pedal application and accelerator position not changing (for example, the accelerator is stuck or trapped), the electronic throttle is driven closed to idle position by the powertrain control module. As the throttle is driven closed, the brake force acts on the vehicle and it slows down—to a complete stop if the driver continues to apply the brakes.

Ford says that the system acts “very quickly.” When the brake is released, the system resumes normal operations, but the throttle is ramped back to the requested pedal position to allow a controllable acceleration. It also works in reverse."

Honestly, if you're using the car for racing I would try to contact Ford Performance and see if they have a solution for you. Might cost some money, but it may also improve functionality.
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Old 01-19-2017, 03:17 PM   #12
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Thank you for the detailed description, good information to know.

I will try and contact Ford Performance, an tune may be needed to get rid of it.
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Old 03-03-2017, 09:45 AM   #13
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A tune might help , I have been wanting to play more with the TQ settings

The Focus doesnt get its load from the speed sensor , actually I dont know of any Ford past 1999 that does , Load comes from the MAF

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Old 03-03-2017, 09:54 AM   #14
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Thanks for the help.

I did end up "fixing" the issue for a few ice races this year buy pulling a fuse and unplugging the brake sensor. However, you then have no tail lights.

I added a switch to the fuse under the hood that controls traction control and abs so that is easy to switch on and off now.

Looking into it I think there will be a way to add a switch to one of the wires in the brake sensor plug and turn off the signal to the computer while keeping the hard lined tail lights going. Project for when it is warmer. Unplugging that sensor is a pain due to location so a switch would make life much easier.
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Old 03-09-2017, 12:08 PM   #15
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i remember seeing some rally videos of Tim O'Neil LFB his Fiesta ST. curious what his solution was to the problem. (he also has Focus RS)
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Old 03-09-2017, 12:57 PM   #16
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From what I have read and seen, the RS has a button to turn all the "assistances" off, same with the ST I believe, but someone whom actually owns one might be able to chime in and confirm.

looked it up, the ST does have a button that will turn everything off; I assume the more sporty RS does too.

Thanks for the input though!
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