garmin

Well, again, when releasing the brake lines at the master cylinder, fluid is leaking out and the brakes are released. To me, this proves that the lines at the MC are in fact pressurized and that the MC does not let this pressure back into the reservoir?

I removed the vacuum hose at the servo, letting ambient pressure in without the brakes releasing. Also, the engine then sucked in air through the hose as expected, so I don't think it has anything with to do the vacuum unfortunately.

Hi, Here comes a really puzzling issue. It all stared with a failed master cylinder on a 2009 Skoda Fabia 1.4 (BXW). After replaced, the brakes engage very quickly when the pedal is depressed just a few mm, and worse, pressure is building up in the lines making the brakes on all wheels drag and eventually lock up. I know this since when loosening the nuts connecting the lines to the MC, fluid is leaking out and the brakes release. I can only see that this can be caused by (1) a faulty MC, (2) a faulty servo or (3) a too long push rod. Since the push rod cannot be adjusted (as far as I know), I first tried with another MC. Exact same result, I then replaced the servo unit. Exact same result. I have tried the following measures to try to get the brakes to release, all without success: 1. Remove the break light switch (in case it would hinder the pedal to fully retract) 2. Disconnect the vacuum tube from the servo 3. Loosen the bolts that holds the MC to the servo to create a couple of mm gap between them, simulating adjusting the rod Now, I must admit that I have used aftermarket components, except that the first servo was OEM. For reference, the following products have been used: MC1: Vika 866148 - https://www.autodoc.co.uk/vika/13157615 MC2: LPR 1056 - https://www.autodoc.co.uk/lpr/2360878 Servo1: OEM Servo2: Borsehung B15996 - https://www.autodoc.co.uk/borsehung/10705705 This is honestly driving me crazy. Should I try a OEM MC? But what are the odds that two separate aftermarket MCs have the exact same issue? Any help would be very appreciated. /Mattias