Has Anyone Encountered Runaway Throttle?

[jerock]

I'll be glad to see what the outcome of your test shows. I've tried a very non controlled test using both 1 pedal & 2 pedal & haven't noticed a difference.

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[lakeguy55]

I know someone from Ford follows this site. Hopefully will result is some type of change since so many are reporting unintended acceleration.

As far as I'm concerned, I'd support a change that didn't turn on Cruise Control unless you were above 30 MPH. In all my years with CC vehicles, I've never used it below 30 MPH and I don't palm the wheel unless I'm well below that. This change would solve the issue for me.

 

[comandante]

This is something I've noticed a few times, it's concerning, and I'm trying to hash out what's actually happening.

After reversing at slow speed (from a parking spot for example) and then shifting into drive, I've felt what appeared to be uncommanded throttle response.

I was in one pedal drive. No automation features were on. It only has happened when selecting drive immediately after reverse at slow speeds.

This morning, after backing out, slowing to a near stop, and selecting drive, it felt like the truck had a significant/disproportionate throttle input that forced me to switch to the brake to control. Even after my foot came off the throttle, I did not feel immediate regen as I would typically expext. The best way I can describe it is it felt like 'lag' like maybe I had throttle in, the truck then starts to accelerate hard, I come off the throttle and it still wants to go as if the truck hadn't caught up yet that my foot was off.

I'm going to try and test this out a bit. I usually back into spots so I haven't seen it much, but easily 3 or 4 times now and each one is startling. Has anyone else had this or knows why this could be happening? I know reverse and drive have different throttle responses but it feels like the truck is really trying to go and the only way to stop is with brake.

Yes this happen to me as well but i was on regular brake and gas pedal mode. I did notice that 25mph or lower icon which i don't know what it means?? it scared me because im quickly accelerating in a parking lot.

 

[strmwzrd]

Early on with my truck (2 pedal on) I backed into a parking spot. When I got ready to leave, the truck lurched almost instantly forward about a truck length before I could hit the brake. I pondered if I had my foot partially on the pedal while shifting into drive which would have been an awkward angle of foot on the brake and pedal at the same time. I came home and tried to duplicate the scene a couple times when I had more space in front of me. It never happened again.

 

[TheBigBezo]

I tried engaging cruise control after turning the truck on and it correctly says it can't be activated that slow. I tried hitting both buttons too. I don't think whatever it is some of us have encountered is related to that.

I wonder if it is related to the different gearing between reverse and drive. Drive outputs much more, so I could see shifting to drive and having some throttle in but in my case even if I lurhced forward due to me having my foot pressed more than I thought, it still wouldn't explain why it felt like the truck would not stop while in one pedal mode. Only when I physically breaked.

 

[strmwzrd]

I tried engaging cruise control after turning the truck on and it correctly says it can't be activated that slow. I tried hitting both buttons too. I don't think whatever it is some of us have encountered is related to that.

I wonder if it is related to the different gearing between reverse and drive. Drive outputs much more, so I could see shifting to drive and having some throttle in but in my case even if I lurhced forward due to me having my foot pressed more than I thought, it still wouldn't explain why it felt like the truck would not stop while in one pedal mode. Only when I physically breaked.

My experience felt like the truck instantly transported 20 feet out. My family was in the truck and we were thankful no person or vehicle was in front of us. I wonder if the pre-collision would have engaged? I'll reiterate, this truck absolutely traveled 20 feet before I could blink--scarry. I cannot duplicate nor has it happened since.

 

[ciferguson37733]

Curious why you switch to 2 pedal on the highway. I’ve never seen the need to switch, especially when using cruise control. I haven’t noticed much difference.
On a winding two lane I love 1 pedal. It’s like driving a stick shift.

Update - I have been taking mileage data with 1 pedal vs 2 pedal.
Latest test today was Seattle, Wa to Astoria, OR.
Started 80% charge, 45 ish, 68 cabin temp, setting of 1 on seat heat, fan on 1, no steering wheel heat.
Seattle to Centralia, WA:
Time: 1:29:45
Dist: 70.6
Mileage: 1.8 m/kwh
Mode: 2 pedal

While in Centralia, recharged to 80%, set mode to 1 pedal, and continued.
Dest: Astoria, OR
Time: 1:19:36
Dis: 75.6
Mileage: 1.9 m/kwh
Mode: 1 pedal

Can do some more testing - next time going in the opposite direction.
2 pedal Astoria to Centralia
1 pedal Centralia to Seattle

However - the statement on another thread that led to this test seems to have been disproved under these conditions. That statement was along the lines of "1 pedal mode kills the range".

 

[jerock]

Seems like the common opinion on here is there is not enough difference between 1 pedal and 2 pedal to make any difference. Pick the one that suits you.

 

[FordLightningMan]

One time when I was making a turn in a parking lot, the truck started to accelerate very quickly. It was startling (tbh it scared the sh!t out of me) and I had to slam on the break, thankfully no one was in front of me. My hand had hit the cruise button while making a turn, this made the truck instantly go into full throttle mode. That was right when I got the truck and it hasn't happened in a year since, but it is only because I an very aware of my hand placement near the cruise control button. I had to show my gf who also drives the truck what happened, so she doesn't accidentally trigger ramming mode in a parking lot. It is definitely something that could happen easily and then you're doing 0-40mph in 2.5 seconds in the wrong location.

 

[PV2EV]

@Ford, FIX THIS! It has happened two more times since I last posted about it in this thread. I am positive it happens in the following condition:

1. Driving in adaptive cruise control when deactivated by manual braking (to turn into a parking lot, which is a more common scenario for a brake based shutoff)

2. Parked nose first and shut off the truck

3. Start truck and reverse out of parking space

4. Shift to drive, apply throttle gently and truck continues to accelerate when throttle released requiring emergency brake application

As this happens with the wheel turned (or straight), and/or the truck not clear of obstacles there is no time to look at the dash to see the condition of cruise control. Additionally as I am clearly below the minimum activation speed I am filing a safety problem with NHTSA here: Report a Vehicle Safety Problem

 

[Maquis]

I posted this in another thread, but I’ll add it here….

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.

 

[Phineas Magliozzi]

Experienced "runaway throttle" yesterday. After a hard acceleration the vehicle would not drop back to "idle". I ended up keeping constant pressure on the brake pedal, pulled off to the side and had to essentially stand on the bakes to keep from moving. Shifted into N, then Park, and when put back into Drive it tried to take off again. Freaked me out a bit, I kept shifting back and forth and eventually it stopped. I may have turned off the vehicle at some point, don't really remember. 1PD not engaged, cruise control should not have been activate 'cause of me standing on the brake pedal, has anyone else experienced this?

 

[TheBigBezo]

Experienced "runaway throttle" yesterday. After a hard acceleration the vehicle would not drop back to "idle". I ended up keeping constant pressure on the brake pedal, pulled off to the side and had to essentially stand on the bakes to keep from moving. Shifted into N, then Park, and when put back into Drive it tried to take off again. Freaked me out a bit, I kept shifting back and forth and eventually it stopped. I may have turned off the vehicle at some point, don't really remember. 1PD not engaged, cruise control should not have been activate 'cause of me standing on the brake pedal, has anyone else experienced this?

I would 100% reach out to Ford ASAP and see if they can download diagnostics from your truck. While my issue was fixed with a brake application, truly runaway throttle in an 7k lb truck with 775 ft lb of torque could get dangerous in a hurry.

 

[PV2EV]

Strange how they reply to many posts asking for the OP to contact them, yet they have ignored this CRITICAL SAFETY ISSUE!

I can't think of a worse situation. One could easily run someone over, drive in to a storefront, etc...

When I remember I turn off cruise control once I pull in to a parking lot.

 

[GoodSam]

I seem to remember, a number of months ago, that if I turned on cruise control (and I use ACC as much as possible), then it would stay active when I turned the truck on again. So the resume button might hold the last speed - 72mph! Better not hit that accidentally. But at some point it changed to require reactivation after restarting. Truck has had the 6.8 update at this point, so I wonder if some folks are not fully updated yet?

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