That didn t solve the issues so i put in a new brake booster.
F350 brakes go to floor.
Technically there are two main causes that would make the brake pedal sink all the way to the floor.
Full system bled three times all brakes adjusted and in good condition.
New master cylinder bench bled no leaks in system.
The brake pedal goes to floor when engin is running.
If the fluid is full then continue onto brake fluid is full down further in this guide.
The brakes were working ok but after bleeding the brakes all around i am now getting air in the system a read more.
Brakes problem 1994 ford f350 two wheel drive automatic 90000 miles i have a f350 dually diesel.
Anytime you have a brake pedal that goes to the floor raise the hood and locate the brake master cylinder s reservoir.
One of the reasons is the brake system loses pressure from an external brake fluid leak.
1 leak from brake line or brake caliper.
Check the brake fluid level.
The leak may coming from a brake line or one of the brake calipers.
I have found no leaks.
My brake pedal is very soft.
Using a flashlight check the level of the fluid or just remove the lid of the reservoir and look inside.
It will stop the truck but the longer you apply the brakes the more it goes to the floor until eventually it is on the floor.
The shop i had the work done at has no idea.
The brake pedal will slowly under pressure go to the floor.
Fluid doesn t seem to be disappearing.
Reasons your brake pedal goes to the floor.
If you hit your ford f 150 or super duty s brake pedal and it goes to the floor stop the vehicle and don t drive it until you find a solution to this problem.
This article applies to the ford f 150 2004 2014 and f 250 super duty 2005 2014.