Got a 250 10 plate 80k full service history with stage 1 remap and ktr panel filter. Noticed lately not quite as potent ie boosting up idle running bit lumpy, plugs new coils new. Anyway thort id checked map sensors. One on manifold was filthy other sensor was clean. So gently cleaned with dry cotton bud. Just build up of dirt from 80k of driving. Did 4 days ago now, car is totally different got its zip back 100%. Thort id post as i was puzzled what prob was probably covered elsewhere but worth a check if you got same symptoms and fussy like me.
