Whilst I know this will be a case of running a diagnostics (which I don't have easy access to) I'm just wondering if anyone has any 'starters for 10'?
My average MPG on my 1.8T (AEB) has dropped from 35 to 26, idle is rough and misfires when under power (especially in 3rd gear for some reason). Also, low down torque seems to have gone and top end punch dissappeared. Basically running rubbish!
MAF was replaced with an OEM replacement 16 months ago so don't think it's that. Thinking it could be an ignition coil? Also, worth noting that passed MOT whilst running like this so presumably emissions (and therefore Lamda sensor?) okay??