This 1977 MGB had the most unusual problem. As you placed your foot on the brake pedal to begin slowing down the car would actually speed up! A more disconcerting feeling is rarely felt! It turns out that there was a hole in the diaphgram in the servo, and when he brakes were applied a great quantity of fresh air would enter the inlet manifold. Since the car was running rich, this extra air leaned out the mixture and made the engine run considerably faster. We had to rebuild the rear brakes, too. It was running and stopping at the end of the day, Monday 12/12/05.
