I own a 6y2 2005 skoda fabia 1.4 16v AUB 100HP, and had problems with it going into limp mode only when sat idled for about 3-5 minutes. After checking the service history I had notice individual spark plugs and ignition coils had been changed, so I've replaced all 4 spark plugs for NGK BKUR 6ET-10 as recommended by Haynes, and replaced all 4 coils as recommended too, this gave it a much steadier idle but the problem still persisted. I then went on to trying Redex petrol injector cleaner which s