Hi guys , just bought my daughter a 51plate 1.2 16v expression, done 70k. prev. had throttle body & loom fitted, also coil pack & leads. Problem is occasionally she says it will:-, while driving, loose engine power, rev counter drop, eng light on, then recover and be fine. ive had it out and ragged it for miles and cant get it to miss a beat! anyone any ideas?? many thanks!