Hi all I have had my car for around 11 months now it has never run properly it has had the coil pack recall done and a software update new coolant temp sensor ,rocker cover full service with plugs,throttle body cleaned and aligned however when it idles you can hear like a dun dun sort of noise from the passenger footwell and also I notice the oxygen sensor heater pulses on and off with a hot engine and the secondary air pump also runs briefly it has never had any fault codes either even with the rough idle any help would be appreciated as I am close to parting with it .
cheers
cheers
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