VACCUME port is stoped up, cloged up exhaust system,
Look on the carb for a small vacuum source above the throttle body. You would want one that has no vacuum at idle.
The 4180 Holley carb vacuum helps with transmission performance on heavy vehicles. This Holley 4180 carb is a secondary function attached to a transmission.
It depends on the year of the car.....but if you are running HEI ignition (74 and later) it will run to the carb. It goes to a ported vacuum signal. You will find a ported vacuum on a fitting that is above the carb base plate. It should have no vacuum when the engine is idling but will have vacuum when you rev the engine.
vacuum lines,there are three one for each petcock and one for the vacuum advance, the two for the petcocks go to the carb boots, one on each side,and the one for the vacuum advance goes directly to the no. two carb.
1993 on Toyota corolla vacuum hose
When you get ready to run the vacuum line from the turbo 400 trans modulator to an Edlebrock Performer 800 CFM carb, attach the vacuum line for the transmission vacuum modulator to the bottom constant vacuum source or the plug that is below the throttle plate. After that, install the vacuum advance to the port that is signaled or right above the throttle plate. Once that is completed, install the large vacuum line to the back of the carb for the power brake.
yes at the carb
There should be two small and one large vacuum connection points on the front of the carb, hook it to one of the small ones, that will be for your vacuum advance. the big one is for crankcase ventilation. one of the smaller ports is manifold vacuum, the other is timed vacuum. they are not the same, but you will use one of these, usually the "timed" port.
A vacuum gauge is all you need to tune in a carb. A gauge for each carb if you have more than one.
Any constant source would be fine. Straight off the manifold, or the throttle body of the carb would work.
sounds like the vacuum secondaries are not working properly, check this and it may be the solution to your problem. the wrong vacuum port from the carb to the distributor will also cause this
Check your timing and your vacuum advance.