ok so I'm really getting sick of this!!! My car ran like a champ all winter, but now that the weather is getting hot everytime it get's above like 80 degrees outside it starts to hesitate and stutter when driving. When i start the car on a hot day it idles maybe 300rpm above normal for a long time and if i let it sit for 5 min or so then sometimes it's drivable, SOMETIMES! I run 93 octane gas, and cleaned the maf and even took out the k&n and put in a stock filter. But now, i notice i only have this problem when it gets hot! I have only had the car since last august, so maybe whoever had it set the timing way high and that's the problem??? Any suggestions please!!!