05 overheating, +RPM
The other day was the first time i really put my WRX through a full day of stop and go driving in summer heat. I was sitting in a drive thru and noticed that it was idling at 1500 rpm and the temp was just a hair below redline. I quickly turned off the AC and it jumped to 2000 rpm. I drove it for a couple miles and cooled off and rpm's were normal at idle. All it needed was for the reservoir to be filled with coolant and it's fine now. My question is, is it normal for the rpm's to raise to compensate for increased engine heat, or is something out of whack? I've never known a vehicle to do this in an overheating situation.