just as the title says. My 289 overheated the other day. (water pump went bad and leaked out of the weep hole) It got pretty hot, but I shut her down and filled the radiator back up to drive the 2 miles back home. It cooled down and drove fine, but the idle is high now. About 2500RPM. And idea why this would happen? Idle has been high every time I've started it since.