Seriously are you like 16 years old? You are not txting your boyfriend so type proper english FFS.
An afm failing will show similar symptoms of what he described. As will a number of other things including those allready mentioned. Do you even know how an AFM works? Without physically seeing a car and knowing all the details it is semi guess work trying to give advice. Hence why I also seperately asked about the smoke out of the exhaust. Would give more clues without physically seeing the car.
You make it seem like every mechanic is an expert. Sorry but no. I would take advice from the forum before taking the advice of most mechanics. Given that there are only a handful of speciality Skyline mechanics in Australia that actually know their stuff and most are on these forums anyway. Given that he has a stock ECU I doubt he has his own tuner.
Who said he was going to spend money? He asked for advice, not "what do I need to buy?". Swapping over an AFM with some one elses is a 5 minute job and doesn't cost you a cent. Checking the BOV also doesn't cost you a cent and takes 5 minutes.
You act like a child, appear to be unintelligent, have a stupid user name, have been on the forums for less than a month, are starting shit with some one that has been on here and knows about Skylines a hell of a lot more than you and start mentioning forum users as e-mechanics when most of them on here are proper import mechanics, engineers (like myself), tuners or just highly motivated car lovers that enjoy doing every thing them selves.
It is YOU that needs to chill and get off his high horse. Your the one that arked up because I called you on your lack of knowledge of what an 02 sensor does. Get over it and grow up.