By the MAF do you mean the mass air flow sensor? On the dashboard its coming up with an engine fault like an orange shape, that has been there before the problem though.
Alright everyone I'm new here so I'm not sure how this works! I have a Y reg 1.0L micra. When I start the car I have real problems accelerating for the first mile or so. It struggles to get above 20mph! Sometimes I can here a "popping" sound. When I reach 30 after a few seconds all normality...