My 67 Polara 383 w AC (not working) has what appears to be a vacuum leak and consequently its idling, accelerating (bogging) and driving rough. In checking all the vacuum hoses, and spraying brake cleaner around the carb and intake manifold, I find that the engine smooths out when I take the vacuum hose OFF the Brake Booster and let it suck in atmosphere. So, in looking stop a leak to smooth out the rough idle I find out that CAUSING a leak fixes the problem. The rough idle returns when I...
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