i have a 2012 chevy captiva 2.4 and it has a rough idle. upon initial cold start it will idle fine when in high idle but as soon as it starts to idle down it start rough idling and will even die.If you press the accelerator at all it will stop rough idling and idle perfectly fine. after it stops rough idling it will not doing it again until you turn off the car and let sit for 10+ minutes. Any help would be appreciated thanks.