Hey, my son bought a 2011 XR6 Turbo ute approximately 6 mths ago, and until now its been running VERY well. It has CAI, after market intercooler (http://www.ebay.com.au/itm/HDI-HYBRI...UAAOSwnDxUhqIl) and a tune. As I said it has been running fine, but out of the blue it now is idling low, quite rough and rattly, and the engine light is on. Raise the idle via the pedal, all noises and roughness disappear. When its driven, a weird induction noise comes in with a noticeable drop in power, yet the boost gauge still operates normally. Had it at a supposedly reputable workshop today, thinking a scan tool may help but nothing was found. Hoping someone here may be able to offer some suggestions.