Hi i am going to give my throttle body a good clean tomorrow ive anticipated for all scenarios maf sensor residue in inlet pipe one thing that has popped up in my head is if it were oily maybe it has a dodgy pcv valve as i fix a volvo a few years back that had a similar problem at it was pcv valve causing a problem out of interest where is it located on a twin air engine, other than that im going to clean the the maf sensor as well