Thread: Problem on braking system

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Thank you for your answers.
There is no trace of liquid, especially behind the master cylinder. It would be really bad luck to have received a master cylinder defectful...but why not!.
I changed the fluid type with "blue racing fluid" which is very heat resistant and DOT4 compatible. What is amazing is that with a completely new system the dysfunction persists. I tested the booster, it works perfectly.
I’m gonna run a new purge and check my connection connections.

Hello guys;
I made a new bleed of the brake lines, now i'm sure there is not air inside the brake system! Unfortunately my problem is same! I push the pedal absolutely no brake, (alarm light brake on). After 15 to 20 pedal strokes the car brakes almost normally with a stronger force difference in the rear (brake light is off). Back home again the pedal goes to the bottom...!
I noticed when I was bleeding my brakes (after installing my new master cylinder) that the rear reservoir is pushing or bubbling up fluid when I push the pedal (kick-back of fluid into the reservoir). Its not air bubbles but fluid pushing up into the reservoir and sometimes even coming out of the reservoir. The front doesnt do that ! Is this normal ?

Thanks again !