[lynx42]

Is the vacuum line coming from the right place? I don't know about an M8 but I had a Dodge for sale a few years ago and a prospective buyer took it to his mechanic to give it the once over. When it was returned he didn't say anything but that he would think about it. The next day another prospective purchaser took it for a test drive with me and nearly put me through the windscreen. Turned out the first blokes mechanic had moved the vacuum line to the centre of the intake manifold away from where it should have been at no.6 cylinder and there was far too much vacuum . The mongrel first bloke came back to me with an low offer "as there was a big problem with the brakes". He got sent packing. Youi might say I wasn't very happy with him.