My G37, an 09 with 155,000 miles has been having issues with my car lurching/rough idling. Sometimes it will shut off when I'm at a stoplight or as soon as I put it in park. When driving you can feel it, it only lasts a couple of seconds. I've had it checked out by electricians, transmission checked out fine, had a tune up. So far I'm out about $1200.00 The problem eased up for a few weeks but is back with a vengance. It happens when I'm driving slow or fast. Has anyone else encountered this? My