what's this thing
I posted this in the general discussion, and I'll try here as well.
What's the ball looking thing underneath the air filter on a '97 2wd? I was changing the heater control valve, when I bumped what looks like a vacuum line from the "ball" to what appears to be the distributor, and it's dry rotted and it cracked, so of course I think it needs replacing. Any help for this noobie is much appreciated.