Okay, I'll give it a shot at the car wash (gee, wouldn't it be great if that was the problem). I'm not sure as to the pressure, but off the top of my head I think it read 125 psi-- I'll double check on Monday and report back. I'll also reduce the charge (after I try the AC with a clean condenser).

Thanks guys, I really appreciate the help you've given me.

~Scott