My 94 Caravan w/3.0 has recently started delivering poor heat. Except when cornering. Heat is mediocre at best, but when you turn (more noticeable on left turns), the heat comes right back up to where it used to be (damn hot). Engine temp gauge always remains steady, just under half, where it's always run once warmed up. Coolant is good, and level is up.
Any ideas? I'm stumped...