Hi i have a 2013 fx4 echoboost and have brake problems. While i m driving, dashbord display message in ref:..... check for brake system......with all bell warning ringing... When i toutch the brake pedals it s hard as a rock and no brake at all.... Computer register code c 109d, Dealership already change brake booster and vacuum pump but problems still there, they dont know what to do next......even with ford hot line they dont know....happen five time since october...intermittent problems, always in humid or rainny day for now, Anybody have heard about that? Very dangerous. Imagine having this message at 110 km/h
Happen 2 times, after they change vacuum pump, next time they change the brake booster, and now after two morentime they dont know what to do, even the compagny, i m stuck with that
Help please

 

clarify what you mean by "hard as a rock and no brake at all" please.

It sounds like you are having a complete loss of vacuum. But then you still have brakes, they are just unboosted. When this happens - if you push very hard - do you get braking?

Its very odd that they replaced the vacuum pump and the booster but yet the problem still persists. Are there any other points in the vacuum lines for leaks to occur? Perhaps there is an intermittent leak where the vacuum line attaches to the engine?

 

Since your saying it happens in wet conditions this sounds like electrical did they ever state checking that sort of stuff

 

On december 3, After my 7 brake failure in one month i called my dealer while i was on the highway with no brake and told them i was comming using compression and parking brake. I have to do that because the service director say that he cannot do anything till his tech see the problem by himself. Imagine that this guy is the service director, incredible. It was a humid, rainny day like all other time. The tech finally listen to me this time and he found that ::::: hose not seated at left front couplerdrawing in moisture:::the tech has left when a return to take my truck two days later so
I will clarify today what exactly it was and if the moisture come from the same place that the one who make the engine running bad on acceleration this come from moisture to according from other post.
Some ask me to clarify about the hard pedal, hard as a rock, i can say that my truck just slow down very slowly and after a few second nothing at all and after slow down again and after nothing again.
Be sure that if i dont have a b plan i probably write it to you in a hospital beb.
Be sure too that if you tow someting you will never be able to stop, believe my experience

 

wow, that is very painful to read.

My only guess at your explanation is that the vacuum system was sucking in moisture which was causing it to fail? Hence you have no boost, but your brakes work just fine otherwise. So if you pushed harder on the pedal you would still have stopping force, just not as much as normal.