Sudden Brake Failure - Crashed Into Building

[Camdak]

I fear that this will be yet another thread announcing a complaint or issue in which the OP will never come back to let the group know what the final outcome was...

I say that because OP has not stated that they have an appointment with a qualified repair facility to evaluate the vehicle, no mention of contacting Ford or their selling dealer... i am left to wonder, are you still driving it around town as if everything is fine??

Did we scare him off with talk of it being driver error?? Or did those comments strike a nerve??

I agree with the consensus that if this were my vehicle and it had an apparently major sysyem failure it would have gone on a flatbed directly to the dealer.

I sure hope he doesn’t just up and leave this forum, I would miss OldSarg’s contributions here! ( although, wouldn’t blame him if he does).

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[dmopro]

@@ Rant Mode On

Please, can we not give OldSarg a break here? It has been just over a day since he started this post. I am sure he has more pressing things on his mind than updating this thread, especially if there is nothing to add.

If you look at his stats, since joining in 2021 he has started only four threads with 27 messages. This tells me he doesn’t make multiple daily visits to the Truck Club forum as I do. After all, it is the weekend, and the truck may or may not already be at the dealer. Can’t we just give him a chance to get things sorted before we roast him?!

We can all (at least I hope we can) agree that none of us know what the issue is here, and that it probably wasn't the best idea driving it home after a brake failure. There are many sound ideas being posted here, but until a mechanic finds something we are all just best guessing. And unless he returns to tell us what was found, we never will know. With how critical this group is getting towards him I would not be surprised if he never responds.

Feel free to roast me for my comment as I don’t give a #$%@

@@ Rant Mode Off

 

[oysterville]

Okay

 

[Propane Burning Man]

Really? So, if some of us believe it is driver error we are "roasting him"? Or as 1 post said basically calling him a liar? SMH

 

[Bertram]

This past Friday my wife and I were going to dinner and when I was parking the truck in front of the bistro where we planned on having dinner with friends the brakes suddenly failed as I was parking. I was not going very fast but when I stepped on the brake the pedal went to the floor and suddenly the truck jumped the curb. I was pumping the brakes as fast as I could and I think on the 3rd pump the brakes engaged but it was too late we had run into the store front damaging the truck and the store front of two businesses.

After the police and half of the FD showed up we determined the truck was drivable and since I only live about 5 miles from the bistro we decided to just drive home slowly. About half way home I had to make a left turn and when I was slowing down the brakes did the same thing again and again on the 3d or 4th pump the truck stopped with what I would call a hard stop and a grabbing sound in the brakes.

Has anyone else experienced something similar?

These are fly by wire brakes. There is no mechanical link between your pedal and the brakes.

 

[MetalsGeek]

Thats another of my questions. All PAST brake systems had a fail safe if brake booster didn't work you could still press BUT much harder down to get vehicle to stop. No idea whats inside the current hybrid brake system. Extra complicated with regen braking involved.

I have to believe that this "fall back" design concept remains relevant even for all current vehicles, including hybrids and EVs. I've had a traditional master cylinder fail due to corrosion pitting of the bore wall that tore up the piston seal, but it certainly did not go from 100% to 0 and then back again. I think we all would really like to know what happened here. If anyone can find a theory-of-operation writeup on Ford's design for the EBB used in the Mav, I would love to read it. Clearly, the crossover point from regen to friction was imperfectly managed in the 2022's and created the abrupt stop problems. It's still not perfect in my 2023, but tolerable.

 

[Toddman45]

I personally believe people's opinions are like assholes in them.

The Prius issue was found to be floor mats that caught the gas peddle. I think people were sent new and shorter floor mats.
Bob

I remember when this happened it was around 2015 or 16 because even some aftermarket floor mat manufacturers started reducing the length of their floor mats to stop before the gas pedal.

 

[RookieBlue7]

Should’ve made them call for a tow. If it was truly brake failure, the insurance likely won’t cover it now because you’ve overwritten the data they’d require to be pulled prior to the accident. Hopefully for your sake they will, but they already only pay around 1 in 10 “brake failure” claims.

 

[RR - All the way]

Really? So, if some of us believe it is driver error we are "roasting him"? Or as 1 post said basically calling him a liar? SMH

Believe or think???? You may want to think about which of these words is appropriate.......

 

[Phimosis]

This was an interesting read. Looks like there are clearly 2 camps here.
Camp 1: he’s lying. He made a mistake and hit the gas instead of the brake and he’s making up the story to cover up his incompetence.
Camp 2: we believe you. That is really scary. Why would the police let you drive the vehicle home when we know the brakes aren’t working correctly?
Answer: because the police are in camp 1. The police have seen so many cases where the driver claims that they mashed the “brake” to floor, only to find that the engine was revving up and car was speeding up as they mashed the “brake”. Because it wasn’t the brake. It was the accelerator.
Once they’ve seen this a dozen times, they’re going to automatically assume it was driver error and not mechanical failure. A quick check of the brake pedal will verify whether it is working correctly.
And yeah, a quick inspection will tell the whole story. Has the car recently been worked on? Like could someone have been doing suspension work, messed with the braking system and introduced air into the brake lines, then didn’t bleed them properly? If not, check the brake fluid reservoir. Is it full? If it is a full reservoir and the braking system wasn’t worked on recently, then yeah, it’s like 99.99% probability that it was driver error. The police probably did these steps at the scene and determined it was driver error and decided to let him continue driving the vehicle.

The 0.01% chance option is that it wasn’t driver error, the braking system wasn’t modified or worked on, that there is no brake fluid leak and that the brake fluid reservoir is full, yet a mysterious and unknown design bug caused the braking system to intermittently fail. That would be super scary. It would be super scary for all Maverick owners. Because people would randomly die as they hit their brakes at 70 mph on the freeway, no braking occurs, and they go slamming into other cars, or go driving off of the roadway. Has that been happening? Nope.

 

[Bluebeard22]

Brake pedal's on the left

Lucky no one was hurt. Depending on the age of the vehicle the left pedal may be a clutch.

 

[CurtisB]

I just want to know if the truck was taken to a dealership and, if they have found a fault in his system. This is a big deal.

 

[Fcnrwy]

Since this happened on Friday. It would be hard to get service.
I would HOPE the OP would post an update... This week.

If WE dont hear anything... Than its another....
Post N Go...

Jerry

 

[AzureBlueBill]

These are fly by wire brakes. There is no mechanical link between your pedal and the brakes.

Are you guessing that this is how it actually works, or do you have proof that this is true? It doesn't sound "right" to me.

 

[pigsareus]

yea, if my brakes did not work, why would anyone drive it.... Just saying

yep , this is a 'science', I'd have never gotten back into that - just tow it.

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