Brake pedal jams up

[integramania]

Hi, anyone experience before brake pedal jams up while driving at low speeds then resumes to brake normally after that? I changed the servo from my double layer back to the original single layer one. Is this a prob with the master cylinder instead? Or is this to do with ABS. My ABS is not fully connected due to some fitment issues. Mech says nothing to do with this.

 

[anakin]

Never experienced before...brek makan sebelah ada laa..

 

[integramania]

Tats why lor...weird la...i suspect its the ABS...coz the pedal does have a pulsating effect when it jams up

 

[pussy]

aiyo. ..change the vacuum brake servo..it's jam up already. .must be rusted or the seal koyak. .

your mechanic know how to do la...

 

[integramania]

Bro vacumm brake servo means the brake servo itself?...i already did that and its the same....i was using a double servo ....then he changed back to the single one....master cylinder was not changed....but still problem not fixed

 

[kby88]

which model bro? if for those with valvetronic, check the vacuum pump..

 

[integramania]

e34 M50B25 bro....

 

[integramania]

Do you mean part No.1 here - http://bmwfans.info/parts/catalog/E...4/march/browse/engine/vacuum_pump_with_tubes/

Also the problem happens once in a blue moon....it's not always happening hence its puzzling....like when i got the car back from the mech last weekend....out of say 10 times i drove it...only happened once