vette70cdg
Member
1970 454 running good, but rough idle. I started hearing a pulsating noise somewhere on top of the engine. I put my hand on the distributor vacuum advance and can feel it very rapidly pulsating. It stops few seconds and starts again. I disconnect the hose and connect it to a tee on a vacuum gauge and see it pulsating between 14-15 very rapidly. I disconnct the hose, plug it and the vacuum advance stops pulsating. Whats going here? :confusedHow do I fix it? I am not sure when it started? ;help