Sudden Acceleration

[Glocker]

I've had a couple of surges while braking that have scared the ever-living shit out of me. I thought I had been hit in the rear the first couple times it happened. If the symptoms are the same as what I've experienced, I've read that there is a TSB on it that has to do with the driveshaft slip and the fix is a proper lubing to allow it to slide into the tail of the trans better. Sounds crazy, but... ?‍

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[got3fords]

You know these are throttle by wire, yes? No cable to get hung up like in the olden days.

What's that got to do with it, it could still have a mechanical restriction in the pedal travel.

 

[Big Blue]

I've had a couple of surges while braking that have scared the ever-living shit out of me. I thought I had been hit in the rear the first couple times it happened. If the symptoms are the same as what I've experienced, I've read that there is a TSB on it that has to do with the driveshaft slip and the fix is a proper lubing to allow it to slide into the tail of the trans better. Sounds crazy, but... ?‍

I have had a surge during braking a couple times, SCARY, and have found it to be me being lazy, and not getting my big feet far enough over to not hit the accelerater pedal. Having a good brake bleed done to get the brake pedal to engage higher up may help.

The "bump" from the slip joint comes right at the point of stopping. It is caused by the rear of the truck raising up as you brake. This causes the drive shaft to extend. When you come to a stop the shaft has to collapse to lower the rear back down. When it sticks, it will release suddenly causing the bump and thunk. Usually worse the more abrupt the stop.

 

[Grandaccess]

Fat foot and brake pedal travel. It has happened to me a couple of times. You can’t feel the accelerator while braking but it’s being pushed. It scares the crap out of you until you realize what happened.

the truck will sense if you press both, I figured this out on long exits for some reason I press both and it will come up on the heads up saying "power has been reduced" for safety

 

[Kemo Sabe]

It's probably the transmission shifting into a lower gear and surging you forward. Happens to me a lot. Just be careful now that you are aware. These transmissions are too "smart" for their own good.

EXACTLY! That’s what mine does.

 

[Msfitoy]

My truck loves me and would never ever accelerate without my permission...but I could be wrong and your truck might be trying to kill ya...

 

[airline tech]

It’s a combination of the design , brake and gas pedal placement and air in the brake lines.
The mushy brake pedal allows the brake pedal to drop lower and if your foot is resting on the right side of the brake pedal you will unintentionally press the gas pedal with it.
I did this as well when I first got the truck, bled the brakes- ton of air in the RR line, brake pedal now firm and engages before I match the gas pedal height.
Trained my right foot to move farther left vs driving other vehicles and now without thinking I can place my foot in the center of the brake pedal , even if I am off to the side I am above the gas pedal.

 

[ccasanova22]

I had this happen to me enough times and sure enough, it was touching the right side of the foot on the gas pedal when braking. My truck did not display any messages or cut power.

Last time it happened in a parking lot with people around so I’m definitely not liking the closeness of the pedals on the Ranger.

Luckly I sold my last manual vehicle, so being ambidextrous is probably a good thing. I guess I’ll just two foot it from here on, the brake is wide enough and I don’t need to drive a stick anymore.

Kudos to Ford for giving us a wide brake and similar pedal height so we can drive this way. Several women I know, who are of short stature, swear by it and have driven this way their entire life without riding the brake or any issues.

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[Markubis]

That happened to me once while I was exiting a highway on a cloverleaf. I hit the brakes to calm the truck down.
This happened 2 years ago and hasn't happened since.


Disclaimer: It still happens occasionally when passing Tacomas and other trucks, but that's mainly my doing.

 

[got3fords]

I had this happen to me enough times and sure enough, it was touching the right side of the foot on the gas pedal when braking. My truck did not display any messages or cut power.

Last time it happened in a parking lot with people around so I’m definitely not liking the closeness of the pedals on the Ranger.

Luckly I sold my last manual vehicle, so being ambidextrous is probably a good thing. I guess I’ll just two foot it from here on, the brake is wide enough and I don’t need to drive a stick anymore.

Kudos to Ford for giving us a wide brake and similar pedal height so we can drive this way. Several women I know, who are of short stature, swear by it and have driven this way their entire life without riding the brake or any issues.

View attachment 213174

I think a lot of people who drive an automatic with two feet have a tendency to ride the brakes. I occasionally get behind someone whose brake lights are on 90% of the time or more. Probably wonder why they keep needing new brakes and get terrible mileage.

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