OK this is got me completely stumped, when I first start the car everything's alright idles fine does all the normal things I driving like normal boosts good really smooth, but as soon as the blue light goes out on the temperature gauge the car feels quite sluggish and I have to put my foot down a lot more it doesn't matter what mode its in either s or S Plus dont have a code or error,im only getting 390ks on full tank for BP 98... does anyone have any idea what it could be? Could it be the O2 sensor or knock sensor I know it's not the air flow metre as I've only just put a new one a month ago, any help would be greatly appreciated