The reason im asking is that when its idling its 2 yellow leds above Lambda 1 setting and goes to the 1st green light when boosting which means it running rich but not getting to the max power mark at 3 green leds so was going to turn the co screw clockwise a bit to richen it up a bit but didnt want to upset the idle co setting . Im new to all this tuning malarkey LOL .