A. It’s quite common for Gen 2 MINI’s to suffer from coking around the inlet valves. Due to the nature of this direct-injection engine, the valves get coated in a thick black residue, which can affect the performance of the car; loss of power, hesitation and misfiring are not uncommon complaints.
It’s, therefore, possible you’ll need a de-coke service and we offer two levels; simple and full (full details here). There may be other causes but this has been a common way of rectifying general running complaints and is worth investigating. We strongly urge gen 2 R56 Cooper S & JCW owners to factor de-coking into your regular servicing plans.