Alright, my 03 wrx seems to stall/die almost every time i push in the clutch and the RPM drops. it happens after the car has warmed up. it has been doing it for a few years now but it has gotten so consistent these past few months. I have replaced the idle air control valve and nothing. battery is good, alternator is good. i do have aftermarket blowoff valve, boost controller, stock intake, catless turboback exhaust. i have attempted to see if there are any vacuum leaks and was unable to locate any if they exist. no CEL comes on. needs suggestions or help on fixing this issue!