Hi. For the last few days my car has been doing this. It starts fine at work and idles fine. I drive for about 5 or 6 km in stop and go traffic and it idles fine. I get on the highway and drive for about 40km - fine. Get off the highway - fine. Park, shut off the car. Restart within 10-15mins (car still hot) and it idles very roughly. Drive for 1 or 2km and it idles fine again. Shut it off, run into store, come back out within 10mins and it idles like crap again. Drive 1-2km home and it's idling fine. What the hell could this be?