Hello, I have a 09 gti (tsi/68000mil) that had been idling high and Surging when the car is at full temp. Codes are p0507, p2279 and P0171 It's been Goin on for about 2 months now. Mods are stage 2 unitronic, apr Carbonino intake, 3" inch Eurojet, with the stock catback (reso delete) and a...