having carb related issues with 250, single barrel rochester, I was having issues with truck running very poorly, little to no vacuum at the top of the carb.
over the weekend i took another carb that i knew to be good and put on the engine. when it first started up ran very smooth, had lots of vacuum at the top of the carb, enough to pull your hand down tight against the rim. I let it run for just a few minutes and noticed a small fuel leak around my line.
i shut the engine off and fixed the leak, connected the throttle linkage and when i started the engine back up it was not running quite as smooth and the vacuum was once again gone from the top of the carb. could somebody please tell me what in the world is going on with this thing?
