mk 4 golf brakes fail when driven through water

[50 pence]

yes this is really puzzled me why too!! cant see any reason why it would be doing this iv got a bloke looking at it tonight to see weather he can source the problem hope he can find a solution!!

[50 pence]

changed the brake fluid and problem still pursists! bloke at garage had a drive in it but couldnt find anything wrong at first and thaught i was talking a load of s##t!! he finaly had the problem happen while he was driving it and told me its a f###ing death trap and to park it up streight away! so this is the point im at at the min now im not quite sure weather its doing it going through water now but its got this problem all the same he is going to have a look on monday to see if he can source the problem so hopefully i it will get sorted soon!! any more ideas would be greatly appreciated.

[50 pence]

finally found the problem the brake vaccume pipe had a very small split in it right at the join of the exhaust manifold when tested it was still sucking properly but when driven trough water the mist from the water was sucked trough the split causing the brakes to fail bloody glad i have sorted it now!