The hook on the vacuum that hooks your face and feeds it the fish
The vacuum line typically connects to various components in an engine's intake system, such as the brake booster, fuel pressure regulator, and various sensors or actuators. It helps regulate engine performance by managing vacuum pressure for these systems. In some cases, it may also connect to emissions control devices. Proper connection and maintenance of vacuum lines are essential for optimal engine operation.
There is no vacuum at the nipple on the EGR VALVE. The Vacuum line that hooks to it should suck your finger when you speed the engine up. That line will come from the TBI ( Throttle Body Injection housing) and hook to the EGR valve, and when the engine RPMs. go up it sucks the EGR VALVE OPEN. UNDERSTAND.
Vehicles made in the USA have a diagram on a small sticker under the hood, in the engine compartment, that shows emission vacuum line routing.
There should be a vacuum port on the back of the intake, behind the carburetor. It has to have vacuum on it at all times.
Your distributor needs vacuum to advance your timing during acceleration. That's why you hook up your line to the port that has no vacuum at idle. :O)
Any constant source would be fine. Straight off the manifold, or the throttle body of the carb would work.
look under your hook there should be one ....
i got one apart right now and see no vacuum line only a fluid line betweent the master and the power assist pump
Connect the line to a source that is above the throttle body on the carb. It should be a source that has no vacuum at idle.
Start at vacuum source at engine and follow line-by-line
The vacuum line diagram for a 1997 Chevy Venture 3.4 engine outline where each line goes and what it connects to. It can be found within the service manual.