Vacuum Questions...

[Christiansok]

Last night my Dad was showing me a little about timing and we ran into some weird (maybe not weird?) vacuum issues. I disconnected the vacuum line to the vacuum advance and plugged it while he was showing me the timing light and stuff. But with the truck idling we unplugged the vacuum line and it made no difference in how it ran/idled vs having it hooked up. My dad thought this was strange (idk maybe this is normal?) so I put my finger on the vaccum line, no suction at idle. Took the line off and cleaned a little bit of crud out of the end that was connected to the carb. Putting my finger where it was connected to the carb at idle, still no suction. I was wondering if this is normal or if my vacuum lines are hooked up wrong or perhaps something worse.

There are 4 spots on the front of my carb (4 barrel) where vacuum lines are connected. The lowest one near the base goes to the vacuum advance. Another line comes off and is plugged (assume it went to charcoal canister before). Then there is another line that comes out and hooks right back up to the carb about an inch away. Sorry I don't have any more specifics being at work but I can check stuff out when I get home later. Thanks.