i know this is a years old post, but I have the same trim figures on my 04 jcw. Car seems to run great but did used to throw the dsc light on after a spirited acceleration. When I read the ecu I had a p0108 code so cleaned the tmap sensor and that seems to be cured, but still got the quoted symptoms as above. STFT is ok on idle and goes nuts when the LTFT raises to -10, O2 sensors seem to be reading ok, and coolant temp and intake temp seem good too... so I'm left with looking at FPR and injectors (maybe plugs, leads and coil pack)

i also thought i had I had an issue where I was burning oil at a tremendous rate (like a litre to 250 miles) but with no smoke at all. This seems to be improving, strangely, and whilst it's still doing it to a lesser degree, I have noticed a leak again on the rocker box after doing it not 3 months ago... as an outside chance, would a dodgy Pcv valve cause anything like this? I've done the glove test and at idle there's a vacuum as it should be, but not checked off idle

any help gladly received

thanks
Martyn