Brakes loses all pressure once the car is started

AGUTIERREZ

MEMBER
2014 CHRYSLER 200
40 MILES

I changed out the brake calipers and the master cylinder on the car and bled the brakes all the way around. I made sure no lines were clogged. All four brake calipers are receiving fluid and and I get pressure while car is off, but once the vehicle is started it loses all pressure and no more brakes.

1 Reply

CARADIODOC

MECHANIC
33,916 POSTS

There are ways to prevent air from getting into the lines and having to bleed the entire system, but if that happened, I suspect the car has anti-lock brakes. If it does, you will need a scanner to command the ABS computer to open two valves so those chambers can be bled.

You might also take a peek at this article for more information:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor