Subaru 2003 Sti , poor running when warm
 

Hello, when I drive from cold the car drives fine even when up to temp and as long as I like, the problem starts when I turn the engine off and then restart the engine then runs erratic idle, engine management light flickers and misfire. If I leave the car for about 20 mins it then runs fine until ignition switched off then started again, I have attached a video of dash pod.