Quote:
Originally Posted by 66sprint6
My condition is exactly as you have described. I closed the choke blade a bit and then more, and it ran better and better. Not 100%, though. The vacuum is less than 15 inches, and in drive it dives to considerably less. I had to advance the timing and set the idle at around 1000.
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You're running too lean. The problem may be below the carb, like an intake manifold leak. You can check it by spraying brake cleaner/carb cleaner all around the intake manifold gasket surfaces with the engine running. If the engine speeds up, you found the leak. Also check the base of the carb this way and around throttle shaft on both ends of the carb. Sometimes worn throttle shaft bushing leak so bad the engine won't idle.
Checking and adjusting engine timing with the idle above 900 RPM's can be deceptive as the distributor weights can start adding timing above that RPM if not a smidge below that.