I just noticed my 03 STR running weird. If im doing say 40mph, and i ease the gas a little it feels like it has a flat spot in the fuel delivery. Also of notice is the front fan is running alot after i shut the car off. I dont remember hearing this normaly. Possible ideas from the techs??? Only thing i have done to the car is put a new K&N air filter in it, and i did run a new tank of gs through it. Also of note is i dont notice the flat spot until i get to operating temperature. My intial reaction is a thermal issue where the fan in the engine compartment may not be turning on, or possibly a collant temperature sensor??? The temp gauge is showing normal.

It runs fine if i gas it though, as much fun as that is, i want it to run correctly at cruisin speed.