i have 1982 chevy truck 1 ton where does the vacum adavance go on carb?

Answer 1

OK, I will settle this once and for all. I own a shop and have worked on these for years. The simple answer is this; Find a hook-up that doesn't have vacuum on it. Now, crack the throttle, and the one that now has vacuum is the one. It must not have vacuum on it until the throttle is opened up. This is what they call ported vacuum. Hit the gas, and vacuum comes on it, let off the gas and the vacuum goes away. Find one that will do this, and hook to it because you have found the right one.
Glad to help out, Good Luck!!!

Answer 2

It depends on which carb you have for that year. If you have a 2 bbl carb the vacuum advance usually has a source on the base portion of the carb. If you have a 4 bbl carb they usually have the source in the front part of the carb. Aftermarket carbs have them either in the front or the back of the carb or in the adapter plates at the base. If you aren't sure and the truck will start just try them one by one until you get one that has enough vacuum to advance the spark. Keep in mind that the power brake booster will usually have the largest vacuum line coming out of the carb.

Answer 3

The vacum advace shouyld be mounted on the carb or near it. Look for a small flat metal item about 3/4" thick with a metal rod coming out of it.

Answer 4

Bobweb, I do believe you missed something. If you connect it to manifold vacuum, then wouldn't it be advanced all the time?? You don't need to advance the timing at idle but do need it for acceleration so this won't work. So to answer the question, you need to find the port 'Above the throttle valve" somewhere on the primary side. The location will vary depending on the carb.

Answer 5

Near the base of the carburetor is my guess, since you need a tap to the full manifold vacuum.