I had just had my MK11 JZX100 in for it's mot and it failed the emission test miserably on everything
. Does anyone have an idea what i could do to fix it. It does have a cat on it. Could it have anything to do with it being mapped for 100 ron fuel?
Required, My Reading
CO 0.300, 9.215
HC 200, 515
Lambda 0.970-1.030, 0.750