Greetings all... What are the warning signs of a pump going bad? '84 5ks, sometimes I can feel some, um, "resistance" or vibration at the brake pedal. Occasionly, the pedal will go hard after pumping. Bomb has been replaced in last two months. What's up, doc? TIA Steve Bigelow 84 5ks 82 Coupe headed to the great Audi bone yard in the sky