| Hello and welcome to the forum.
I think you may be on the right track looking for an air leak. You will find the bottom half of the air flow meter is made from rubber. On the bottom of this rubber section is a pipe about 30mm (half inch) diameter. My guess would be this pipe has dropped off. From memory this pipe comes from the idle air valve so not only would you have an air leak but the idle valve is unable to compensate for it.
You may also find the lower rubber section of the air flow meter split. But this is less common.
Good luck |