I was reading up on this because I have my throttle body out at the moment
and I was contemplating giving this a shot.  The TB butterfly plate from my
'84 is a little loose. The van runs ok so the little voice in my head says
don't poke the bear! But I want it to run better and I'm bored!

So the JB Weld idea, (I'm assuming folks have heard of this), is that you
are making that closed plate seal tight again, letting a little less air
through at idle. And in turn a little less vacuum pulling fumes from your
charcoal canister into the TB at idle.

Well, there is also a small hole in my butterfly plate.
My question is, would closing up that hole in the butterfly plate not
accomplish the same thing?  Restricting the flow just a bit. Hopefully back
close to the designed specs?

It just seemed like it would be a lot easier and the JB Weld idea makes me
nervous.  Obviously anything I put in that area would need to be super
solid as to avoid the possibility of it coming off and making it's way into
my engine!

Any thoughts? Is this even something worth contemplating at all or should I
know when to say when and buy a rebuilt TB!?

--
m.