I meant "normal" cold fast idle....wherein it slows down to a "normal" idle.
I knew I should've elaborated on that last statement, but I got tired of typing and hoped I'd explained it well enough in the third paragraph (sticking open = surging once warm) that whom ever would see what was going on and figure it out while testing.
Regardless of that, I hadn't thought of the coolant line plugging. I was only thinking of terms of the air passage itself.
