Accelerating on braking?

[Maquis]

I had something happen this afternoon that I think belongs in this thread.

I was parked at a store, truck off and locked. I came out, got in, started the truck and backed out of my spot using 1PD. Once I was parallel to the parking spaces, I shifted to “D” and as soon as I slightly pressed the pedal, the truck took off. I looked down and the cruise was engaged at 15 MPH. I hit the brake pedal to disengage it. Fortunately, there were no cars in front of me.

I tried 4 times to make it happen again but couldn’t. I even tried pressing the cruise button on the steering wheel, but always got the message “Speed too low to activate adaptive cruise control.” Maybe not the exact words.

There is definitely some kind of unintended behavior of the software here. It may or may not be related to what the OP experienced.

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[Zprime29]

Perhaps the question needs to be, "has anyone experienced unintended acceleration while NOT in one pedal drive mode?"

I'm very glad that we have blended braking, 2PD just feels better for me. Have not encountered anything like this. Quite the opposite, the truck constantly thinks I'm going to crash when going through the drive-thru at Chick-Fil-A and I get the automatic braking.

 

[Maquis]

Perhaps the question needs to be, "has anyone experienced unintended acceleration while NOT in one pedal drive mode?"

Good question!

 

[invertedspear]

I had something happen this afternoon that I think belongs in this thread.

I was parked at a store, truck off and locked. I came out, got in, started the truck and backed out of my spot using 1PD. Once I was parallel to the parking spaces, I shifted to “D” and as soon as I slightly pressed the pedal, the truck took off. I looked down and the cruise was engaged at 15 MPH. I hit the brake pedal to disengage it. Fortunately, there were no cars in front of me.

I tried 4 times to make it happen again but couldn’t. I even tried pressing the cruise button on the steering wheel, but always got the message “Speed too low to activate adaptive cruise control.” Maybe not the exact words.

There is definitely some kind of unintended behavior of the software here. It may or may not be related to what the OP experienced.

Both in the MachE and the F150L I have accidentally engaged CC when turning the wheel with one hand. Just something about how my palm rolls on the wheel hit's it just right. Sometimes I get the "Speed too low" sometime it turns on. I have not figured out the conditions for being able to turn CC on below 15 yet, except I can consistently do so in stop and go traffic.

 

[Dave70]

Yes, the on board crash data computer will tell an investigator everything, especially on these new generation vehicles. Speed, steering wheel position, braking, accelerator, and how much those pedals were pressed, etc... If it's been towed and not driven, that data should be there.

 

[N0v0w3ls]

Just curious if anyone experiencing this happened to be running adaptive cruise at the time?

I was driving a rental Expedition where the ACC was set to the closest follow distance and at one point I felt like the truck wasn't slowing down quickly enough and there is a split second where touching the brake pedal disables the ACC resulting in a sudden stop of the automatic braking and less braking force being applied until my foot went past the braking level that the truck was already applying. I could see this coming across as it feeling like the truck lurched forward.

I haven't experienced this in my Lightning, but I also don't use OPD often. I don't see how hitting the brake pedal could possibly cause any form of acceleration since they're separate systems, but it's possible in a panic both pedals may have been hit if not just flat out the wrong one. Any pressure on the accelerator may override the OPD heavy braking effect.

 

[River Rat]

I use 1 pd and have had problems. When wearing heavy boots with wider soles and with unintentionally turning on Cruise Control. Takes you back when it happens for sure but luckily my cat like reflexes saved the day.

 

[cdherman]

I have big feet and the Lightning was new to me at the time, but twice I nearly hit someone or flew into a busy road. In my case, I am sure my foot either missed the brake or slipped off.

Since the Lightning has such phenomenal off the line response, such events with it can be more dangerous that they were with a lumbering ICE engine. Even powerful ICE engine has a lag that a EV just does not have.

That's my personal observations......

 

[HopingItWorks]

Just curious if anyone experiencing this happened to be running adaptive cruise at the time?

I was driving a rental Expedition where the ACC was set to the closest follow distance and at one point I felt like the truck wasn't slowing down quickly enough and there is a split second where touching the brake pedal disables the ACC resulting in a sudden stop of the automatic braking and less braking force being applied until my foot went past the braking level that the truck was already applying. I could see this coming across as it feeling like the truck lurched forward.

I haven't experienced this in my Lightning, but I also don't use OPD often. I don't see how hitting the brake pedal could possibly cause any form of acceleration since they're separate systems, but it's possible in a panic both pedals may have been hit if not just flat out the wrong one. Any pressure on the accelerator may override the OPD heavy braking

 

[Runaway Tractor]

On two occasions I've experienced unintended acceleration in Blue Cruise in stop-and-go slow traffic on the highway. Nothing to do with one-pedal, and my feet were nowhere near either pedal anyway. It was slow-rolling along in traffic in hands-free blue cruise as it does every day. I believe the car in front of me that was closer merged out of the lane opening an additional car length gap in front of me. Out of nowhere, it began accelerating through gap ahead of me. The sudden acceleration was faster than normal, to the point that it startled me and made me actually slam the brake pretty hard. It would never normally take off like that with a vehicle ahead of me. I am confident it wasn't seeing the traffic in front of me and likely would have rear ended that car pretty hard.

If it happens again, I will hit the dash camera button to save the video.

 

[Dinozero]

I'm not at all harping on OP with what I'm about to say. Accidents happen to all of us.

There was a lot of reports with Tesla's over the years with similar issues.

I believe it all comes down to 1PD and the instant torque/acceleration these cars have.

People that train with guns talk a lot about how the brain has a "hidden autopilot mode" and you want to create muscle memory.


The slight problem with 1PD (I use it too btw) is that the same pedal that makes you GO is the same pedal that makes you STOP.


So we're sort of programming the back of our brain to remember "This peddle on the right... is STOP"

Of course it's only stop when you LET GO of the peddle, but that goes against all of our years of driving.


I think in a fight or flight situation, your brains autopilot took over, and you most likely thought of the peddle on the right as STOP but pressed instead of let go.

BTW.. as far as I know. The other way that your trucks automatic emergency braking WOULD NOT have taken over to help you, is if you were pressing the accelerator. Because the car assumes you want to go forward in that case. If you were off the accelerator the truck would have assisted in stoping.

 

[TaxmanHog]

I believe the car in front of me that was closer merged out of the lane opening an additional car length gap in front of me. Out of nowhere, it began accelerating through gap ahead of me. The sudden acceleration was faster than normal, to the point that it startled me and made me actually slam the brake pretty hard. It would never normally take off like that with a vehicle ahead of me. I am confident it wasn't seeing the traffic in front of me and likely would have rear ended that car pretty hard.

I've experienced that in the past, when I know the traffic is going to be relentlessly slow, I dial back the ACC target speed, ie. was 65 roll it down to ~25-35 or what ever the going rate is. That action impeded the Lightning from wanting to surge forward when occasional gaps developed. When the prevailing traffic starts rolling faster, I bump up the set point as needed.

 

[edwardwatters]

This is a shot in the dark, but wondering if anyone else has heard of this happening...

While driving my Lightning I rear-ended a car in front of me coming up to a stop light. I had one-pedal-driving and auto-hold engaged. As I approached the red light, it was clear that the car would not stop in time, so I applied the brakes. At least I thought I applied the break. Either way, as I put my foot down, the car accelerated instead of stopping. There are two possible reasons: 1) I pressed the accelerator pedal instead of the break, or 2) I pressed the break pedal but the car still advanced forward.

Upon hitting the car in front of me, the air bags went off. Given the shock of the moment, it did not occur to me to look and see where my feet were placed. I assume that I pressed the accelerator pedal by mistake, but after driving for over 30 years, it's hard for me to imagine that I pressed the wrong pedal. But maybe I did.

So I'm just putting this out there: has anybody heard of any instances where an F-150 Lightning accelerated upon pressing the break pedal?

BTW, it's amazing how quickly a Lightning can accelerate over just ten feet of distance.

I had the same issue except I was driving slowly down my driveway to park my 2024 F150 Lightning with only 700 miles and when I pressed the brakes the truck suddenly accelerated and hit my house causing a lot of damage to my vehicle and house not to mention a trip to the hospital ER for myself. Truck was towed and is awaiting Ford engineering to see if it was a mechanical failure or a software failure.

 

[jetfixr1]

Pulling into my driveway the other night, probably not going more than 5 MPH, my cruise control engaged. It lurched forward and started to accelerate towards the garage door. I was able to slam on my brakes and stop mere inches away. I know my hand engaged the CC button but AFAIK, it shouldn't activate at slow speeds. I was on 1PD at the time. Definitely going to file a report based on everyone else's observations.

 

[astrand1]

Pulling into my driveway the other night, probably not going more than 5 MPH, my cruise control engaged. It lurched forward and started to accelerate towards the garage door. I was able to slam on my brakes and stop mere inches away. I know my hand engaged the CC button but AFAIK, it shouldn't activate at slow speeds. I was on 1PD at the time. Definitely going to file a report based on everyone else's observations.

It will activate at any speed. I’ve taken off from a stop and been at less than 10mph and hit the button and it will engage.

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