hi, i have got some problem with my golf 5 gti 2008, that started to have issues a week ago, first fault code that came up was P2187 (system too lean at idle,bank 1) and after a swapped spark plugs while i wait for my new pcv part it change to p2279 (intake air system leak) and now with the new pcv that a testing by blowing and sucking it doesnt leak like my old one did, but it still running rough only at idle as soon as i give gas it goes away and today i cruised at 160kmh for 90km without issues. and my injector only ran 5000km since service with good numbers before and after the service on them. anyone have had problem with coils that doesnt work right only at idle and doesnt throw any fault codes?