Hi all. My Cupra tfsi on 105,000 miles has a slight misfire on idle - no codes, not the hpfp or cam follower, not coils or sparks. Engine doesn't drink oil unlike my old gti so I think its in decent shape apart from this. I'm thinking an injector is clogged or the valves? Anyone know of a garage to get a carbon clean (well overdue) in the south near Reading? Cheers