i have a series 1 rs when i fire it up it is fine but then thick white smoke starts to come frome the exhaust it clears up but starts again when i press the brake peddel please can anybody help as this is really pissing me off

 

Check if you have any brake fluid left in the master cylinder.........

The rear seal failed in my master cylinder years ago and the servo literally "Sucked" all the brake fluid out of the master cylinder and into the plenum,causing the white smoke you mention...

Master cylinder should cure it....