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Accelerated while braking

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Old Feb 14, 2022 | 06:22 PM
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Default Accelerated while braking

Just got into a minor fender bender.

The lady was stopped, waiting to turn left.
I slowed down to a stop with my foot on the brake only. The truck revved and launched forward.
My foot did not hit the gas, and the carpet was not jammed under the pedal.

Has anyone else had this happen, or have any idea what caused it.

2016 5.0l F150
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Old Feb 14, 2022 | 06:30 PM
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In every case like this, you hit the gas thinking the brake. You just didn't realize it.
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Old Feb 14, 2022 | 06:33 PM
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I was stopped for a few seconds before it happened. My foot did not leave the brake pedal.
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Old Feb 14, 2022 | 06:54 PM
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Sorry for your fender bender. I know for me, my big foot sometimes does catch both the brake and gas and scares me, I feel I intentionally drive different because of it. Good luck getting repaired and glad no one was hurt
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Old Feb 14, 2022 | 07:03 PM
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Odd, what is brake torquing? Nothing other than holing the brake and applying the throttle till the tires break loose. I have often done just that and my F150 just stays in place spinning the tires. KM
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Old Feb 14, 2022 | 07:08 PM
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Not sure how big your feet are, but I was wearing sneakers. I would of had to have roughly only 1/2" of my foot on the brake pedal to touch the gas at the same time.
If that was the case, wouldn't it have a slight rev the whole time.

2017bluetruck, my foot was lightly on the brake, enough for it to stop. However, not enough for it to stop if it revved up.

Last edited by Brettanomyces; Feb 14, 2022 at 07:13 PM.
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Old Feb 14, 2022 | 07:14 PM
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There were some GM vehicles that suffered this problem. I haven't heard about it much with the Fords.

Seems the only threads (that I can think of) are related to an issue with the throttle body where it somehow thinks it's a good time to accelerate, or there is an engine problem causing surging idle.
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Old Oct 27, 2022 | 03:17 PM
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The same thing has happened to me on about four separate occasions at this point. I took it to the ford dealership, they had it for two days and were not able to diagnose any problem. They claim to have no other options. What did you do to resolve your problem? Have you come across other people in a similar situation? Could I use you as a reference for another person that this has happened to? You can contact me at Devin@advanced-construction.com. Thanks!
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Old Oct 27, 2022 | 05:03 PM
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I want to make something very clear about 4 stroke internal combustion engines.
.
1. They work on airflow through the engine from intake, combusted in the cylinders to exhaust out the tail pipe.
2. That air enters through the throttle body.
3. The throttle body opens at the direction of the foot control sensor inside the truck. It is NOT by cable operation but electrically.
4. The throttle body has a separate microprocessor and separate Bus to the main PCM.
5. The throttle body has its own microprocessor program to prevent run-away malfunctions since the first ones back in 2004 and carried forward to the present day.
6. Every post that insists an engine has accelerated >by itself< without opening the throttle body to allow air above Idle level, into the engine, see (1,2,3 above) is questionable and with no faults detected or codes set.
.
The safety programming built into the Throttle body processor cannot allow that to happen and shuts down the throttle opening ability. The throttle plate is also spring loaded at keeping the throttle closed to Idle level in the absence of a controlled opening signal calling for power to move the vehicle.
If looked up, you would see codes assigned to these failures and pointing to a Throttle body fault.
This design is present due to the huge liability that would be present on a mass scale, if these safeties were not engineered into the system.
Almost every vehicle in the last 10 years or longer are controlled in much the same way.
.
Acceleration causes:
Operator error.
Shoes with wide soles.
Boots.
Feet that have lost sensitivity, a medical condition.
Adjustable pedal location adjustment.
Seat to far or too close to pedal and throttle.
Floor matt interference.
An engine that Idle >wanders< in RPM and should have been noted by the driver and service corrected.

Last edited by Bluegrass; Oct 27, 2022 at 05:06 PM.
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Old Oct 27, 2022 | 07:51 PM
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Yep...no such thing as 'unintended acceleration' by the VEHICLE. Always...ALWAYS the operator. I mean think about it...you just drove through your garage, killed your wife and maimed your kid...are you going to admit it? lol, no...never...it HAD to be the damned vehicle, and I'M GONNA SUE!
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