sppmaster

In case the piston doesn't tighten onto the rotor shouldn't be there a little brake force on that wheel. What is supposed to happen when the piston is turned in.

Thank you. As i triple read the post I think I fully understood the actions of that guy. But he says that he used another tool and drive ratchet to push the pistons and not recommended by the manufacturer special tool that rotates the piston while pushing it down. And after that he got that low pedal and he says that he pushed the pistons too far and that was a mistake. But he explains that all of this was reversible by turning the piston counterclockwise. After doing that the low brake pedal disappeared for him. Honestly I don't understand how is it possible that a gap can exist between the piston and the brake pad. The only thing that make sens to me is to think that using an inappropriate tool could lead to a gap inside the parking brake mechanism of the rear caliper and that gap is somehow responsible for that pedal behavior but it's just my thinking.

As I have read a lot of writings on the subject over the Internet I wonder if this low and spongy brake pedal could be caused by a bad adjustment of the parking brake or it could be the ABS module. The second thing I observed after the rear brake pads change was the completely maladjusted parking brake. I had to pull 8-10 pins to hold the car. Before that it needed only 2-3 pins. The brake stand test showed irregularity of 35% between the left (lower stopping force) and right rear brakes for the parking brake. I don't have the option to change the ABS and the mechanic from the service shop told me it's OK after it was tested. I've tried with another brake master cylinder but just got the same low and spongy brake pedal.

Eight months ago I went to the official dealer service shop for yearly maintenance. The mechanic changed the brake fluid and the rear brake pads. Since then when I press the brake pedal the car slows down and stops, but if I continue to press the pedal, it goes down to the floor and make hissing sound/noise as if compressed air is going out of it (like a tyre pump). I returned to the service shop and explained all of this. They made a test drive and said all is normal and it takes time the new brake pads to self adjust to the brake rotors. I've driven around 50 km in the city and nothing changed. The next day I was at the service shop again in order to make sure there is no air left inside the brake system. The car was at the service shop the whole day and I was told later that all air is out and it is normal the pedal goes down to the floor. According to the mechanic I should drive 500 km before the brake pads self adjust and pedal stops going down to the floor. I think this is not normal and very hazardous to drive this way. Already passed 700 km but no change. The brake pedal still goes down to the floor when I press it. The FIAT workshop is unable to solve or repair it. Several days later the car was at the service shop for the third time after changing the rear brake pads. The air bleeding was performed and one of the rear brake apparatus was serviced and checked but nothing has changed. Cost me 70 euro for nothing. People from the workshop say this behaviour is normal on all Freemonts. I didn't have that problem before and the brake pedal was firm and didn't go to the floor. Already eight months and no solution to this.

Does anyone read this thread. I've found another possible reason here in the first post. https://www.chryslerminivan.net/threads/read-this-before-doing-your-rear-brakes.159561/ To be honest I cannot fully understand what that person tried to explain about the rear brakes and the gap between the pads and the piston and how he possibly fixed it. Can anyone help.

I have absolutely the same issue with the brakes of Fiat Freemont (It's just a twin car of Dodge Journey for Europe). That soft pedal came after brake fluid and the rear brake pads were changed at the service shop. Never had issues before that point. The pedal was always firm and the max movement that was possible was around 2-3 inches. Now it goes down all the way to the floor and is spongy. I don't know if the reason could be a defective caliper but when the brake system was tested on brake stand all wheels stopped evenly with the needed force. No one is able at the moment to resolve the issue for 8 months. I'm lost. I've even made a video of this low brake pedal. Can you check and confirm the pedal movement and behaviour.