Quote Originally Posted by Taily View Post
What if you completely unscrew the bleed nipple?

If nothing still comes out I'd be either looking for a crushed brakes line (possible, but would more act to give you a firm pedal) or a shagged master cylinder.

Question: If you pump the brakes with the engine running does the engine start to run rough? And, is there a small wet streak of fluid (or evidence there's been one) out of the back of the master cylinder down the front of the booster?

Dave.
Definite stain down the booster. I'll get a photo later to show this. But there is no leakage ATM.