Scary acceleration

[Monke]

I was curious about this so I tested it in an empty parking lot with cruise set point at 55 mph and drive mode set to unbridled. At speeds below 12 mph it wouldn't resume cruise because speed was too low. When testing it at 12 and above, it resumed but did not accelerate fast, it was a slow ramp upward. Also tested with a vehicle in front of me and of course adaptive cruise prevented the car from accelerating at all. So I don't think I buy into this theory.

Well, I agreed. The cruise control explanation doesn't make any sense when the car is almost at a complete stop. Thank you for invalidating the myth. Busted!

https://www.macheforum.com/site/thr...and-forward-by-itself-at-complete-stop.31533/

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[Snakebitten]

Cruise Control works on these current model vehicles at far less than 35mph.

Both my Mach-E and F150 will set cruise at 15mph

 

[axelheimer24]

I’ve had this happen a few times, always while turning the wheel. The button is far too easy to press and 12mph is much slower than you think.

 

[Tom L]

I was curious about this so I tested it in an empty parking lot with cruise set point at 55 mph and drive mode set to unbridled. At speeds below 12 mph it wouldn't resume cruise because speed was too low. When testing it at 12 and above, it resumed but did not accelerate fast, it was a slow ramp upward. Also tested with a vehicle in front of me and of course adaptive cruise prevented the car from accelerating at all. So I don't think I buy into this theory.

The theory is correct. It has happened to me as described above. The last time it happened was a month ago when I was doing a curb to curb turnaround to park in my son’s driveway, so my speed was perhaps 5 mph when it accelerated. I knew to check the cruise control and my meaty hands had engaged it while doing the extended turning of the steering wheel required in a curb to curb turnaround.

 

[burritoman]

The theory is correct. It has happened to me as described above. The last time it happened was a month ago when I was doing a curb to curb turnaround to park in my son’s driveway, so my speed was perhaps 5 mph when it accelerated. I knew to check the cruise control and my meaty hands had engaged it while doing the extended turning of the steering wheel required in a curb to curb turnaround.

Sounds like two different scenarios. I tested resuming cruise control with a target set point, you're saying you activated the cruise control button by accident. Should be easy to replicate. I'll try it sometime.

 

[ChehRob]

Someone is going to run over a pedestrian/stroller/kids is a parking lot. Ford will be a defendant and the jury likely to push for one of those 8 figures payouts. A stopped car's cruise control should never revert to full acceleration in a parking lot. Nor actually anywhere. An interim fix could call for both pushing the CC button AND the increase rachet. Or some such.

 

[curtisfinney]

I was curious about this so I tested it in an empty parking lot with cruise set point at 55 mph and drive mode set to unbridled. At speeds below 12 mph it wouldn't resume cruise because speed was too low. When testing it at 12 and above, it resumed but did not accelerate fast, it was a slow ramp upward. Also tested with a vehicle in front of me and of course adaptive cruise prevented the car from accelerating at all. So I don't think I buy into this theory.

Makes sense, there is not a valid use case for going into cruise control from a stop.

I try to turn my cruise off when exiting a highway anyway

 

[WM RT(R)]

We got my dad's '24 GT 2 weeks ago, no troubles yet, but my current vehicle is a 2015 Jeep GC. In 6 yrs, I've never been able to get any aspect of the cruise control to respond to any combo of button pushes under 25 mph, in fact, sometimes it'll kick out if it slips below while going uphill. This seems like something Ford could accomplish. I also wasn't able to get his Ranger to engage under 25 but I didn't experiment with it. I like the 25 mph limit because we have a lot of little streets that the police are dependent on for their income and it's so hard to stay exact when tourist season's tenfold traffic increase arrives.

 

[Just Lurking]

So this has never happened before. I'm in 1 pedal drive as always. I'm almost totally parked in a head in parking space when suddenly the car just takes off and accelerates rapidly. Fortunately I was able to brake before it hit the car in front. There was a message that flashed on but was gone before I could read it.
Thoughts?

Sounds like the 1 pedal drive bug where it disables suddenly at low speeds? If you're very used to 1 pedal stopping the car and it suddenly switches to "normal" mode it will feel like acceleration.

See if you're eligible for CSP 24B42 in Fordpass and search the forums for that CSP for more info on the bug and the software fix.

 

[burritoman]

We got my dad's '24 GT 2 weeks ago, no troubles yet, but my current vehicle is a 2015 Jeep GC. In 6 yrs, I've never been able to get any aspect of the cruise control to respond to any combo of button pushes under 25 mph, in fact, sometimes it'll kick out if it slips below while going uphill. This seems like something Ford could accomplish. I also wasn't able to get his Ranger to engage under 25 but I didn't experiment with it. I like the 25 mph limit because we have a lot of little streets that the police are dependent on for their income and it's so hard to stay exact when tourist season's tenfold traffic increase arrives.

For my car it’s 15 mph. In my testing I’m not able to get CC to activate or resume under 15 mph. So I think OP’s problem is a bug that happens under a specific scenario.

 

[Mache_Nor]

Something is clearly wrong with the software or parts responsible for CC engage in the Mach E. The random acceleration happens from time to time, but without turning the wheel. What triggers my CC is the parking lot at my workplace. Usually what happens is that I press the CC and line keeping buttons at start to ready the car for the upcoming road (which 99% of the time only sets the stuff ready but not active - as most other cars like Nissan Leaf etc. where you have to activate the system before setting it at a speed afterwards), but then 1% of the time the CC lights green from a standstill. This means that the second I switch the car into drive it goes, and it goes fast. It also sometimes sets speed to 20 kmh and sometimes 32 kmh. I repeat: my car is standing still in a parking spot with no wheels turned, and yet the CC acts strange the 1% of the time. Whatever reason or what the manual states, the same actions should not let to different results.

 

[Mach1E]

Sounds like two different scenarios. I tested resuming cruise control with a target set point, you're saying you activated the cruise control button by accident. Should be easy to replicate. I'll try it sometime.

It’s not as easy to replicate as you think.

Resume doesn’t work under a certain speed if the car doesn’t detect anything in front of you.

This scenario happens in parking lots because the car it detecting other cars or walls or buildings and thinks you’re hitting the button on purpose on the highway in stop and go traffic.

 

[Snakebitten]

It’s not as easy to replicate as you think.

Resume doesn’t work under a certain speed if the car doesn’t detect anything in front of you.

This scenario happens in parking lots because the car it detecting other cars or walls or buildings and thinks you’re hitting the button on purpose on the highway in stop and go traffic.

I believe this is the explanation that fits what I have experienced.

 

[SeattleSteveMe]

So. I guess I'm wondering... every Ford I own, says in the owners manual that cruise control isn't even operable under 35mph.

If a driver is able to hit the button, I'd say the issue isn't the placement of the button, but FoMoCo needs to run an update that doesn't even let that cruise control work under 35... that IS scary!

Holy cow. In parking lots or on the street going slowing in traffic? Crazy.

I like the lower limit for cruise control. I use it in school zones to keep my speed @ 20 MPH.

 

[azerik]

They could also fix the programming with one simple change-

“resume” for cruise control doesn’t work if the steering wheel isn’t straight.

Everyone hits the button accidentally in parking lots when the wheel is turned and I can’t think of a single instance you would want cruise control to resume when turning sharply.

Exactly what happened both times I triggered it.

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