Anyone experiencing rough idle with their JX35? Since new, the idle has been rough, fluctuating some 250 to 500 RPM while in drive. During the summer with the AC engaged, the idle almost bottoms out until the system floods itself with fuel to recover. As you can imagine, the rush of fuel causes the vehicle to shudder as she recovers but then she sounds like a 2-stroke lawn mower while waiting at a light. I've take it in to the dealer to investigate the problem but they saythey are not finding anything and this is normal. I took it in again in March of 2015 for the same issue and the dealer performed a System Update that was to reset the fuel injection sytem. No help, I still get the same problem with shudders almost to the point where the engine wants to die out. I cant imagine that Infiniti would design their vehicles to have such an uncomfortable idle and with the shuddering and constant engine revving as she is trying to stablize her idle. Any assistance would be greatly appreciated.