Nissan micra 1.0 53 reg - poor idle revs once or twice - Big scotto

Hi lads and lasses, my daughter tells me her car is doing something od so on inspection when you rev the car and the rev counter is going down it goes right down as tho its going to stall but has a bounce about two or three times then is ok never actually stalls. I have read a lot of posts about this AFM but have no idea where it is or what it looks like. What I'm after is some sort of help or diagram of where to look or start don't get me wrong I can do most things on a car but never come across this one so would like some advice please

Nissan micra 1.0 53 reg - poor idle revs once or twice - elekie&a/c doctor

This will be a K12 Micra which does not have an Afm.(air flow meter).Poor idle could be related to a variety of problems,including a worn timing chain.I would suggest get a diagnostic check done to see if there are any relevent fault codes logged.Also the car may need a throttle flap clean ,followed by a base idle reset (done via the diagnostic system).