Hello, a little introduction perhaps.
Im an ex pat, raised a Mancunian, i left the UK 4 years ago, now living in Frace. I've been a lurker since the beginning of the year when my mrs bought a (French) 2003 2.0 Hdi pack, and thanks to previous threads, i have solved a fair few problems without having to post myself, including the climate control fan *constantly on full blast* problem (a real PITA for a LHD) but his time i can't find anything that matches my current problem, so....
I have an air leak somewhere in the brake system, the brake servo wont hold a vacuum for more than a couple of minutes, HRH started complaining last week that when starting the car and pulling straight off, she had no brakes, but that it would sort it's self out. low and behold i confirm her findings, i have emptied the servo and held my foot on the pedal while starting up the engine, and vacuum builds and the pedal sinks, i've left the motor running a minute and then switched off, come back 5 minutes later an the pedal is rock solid. the one way valve seems to be working, i can't blow through it the wrong way, although my lungs aren't all too powerful, and seeing as it's a vacuum, i cant go spraying gas detector fluid and look for bubbles on joints during normal operation. i haven't ruled out a dodgy/failing pump, but im not used to any servo ever having lost vacuum on any of the vehicles i've driven, so i'm looking at that as the main culprit.
your thoughts, opinions, ramblings, and occasional nonsense would be welcomed on the matter, where should i continue my investigation?