Hi, welcome to Just answer! My name is Ross and i will help with your question
Has the engine management light been on since the symptoms started?
No the engine management light isn't on.
Ok, it sounds like the Air flow meter could certainly be the problem. The symptoms are classic of the air flow meter. +
The engine management light rarely will come on when the meter is reading incorrectly because the meter is giving a reading but not correctly so the engine management knows no different.