Not really part of this but maybe a parallel point. My 4/4 sigma has had a re-map. The engine has a small tendency to pink around 2500 rpm. Note: applying more throttle stops the pink. That is odd. But the tendency slowly gets worse over 3000 miles or so. Cleaning the MAF virtually stops the tendency to pink.
Oh if someone sources a Formoco MAF sensor for the sigma at a reasonable price please let me know. Cheapest so far £270 which is bit steep for a minor experiment.
