right im in a situation, i took off my maf yesterday because my car is running like sh!te!!
first of all when it was at its normal temp i disconnected the maf and took it for a drive and it drove the same, so ofcourse ther maf is gone. i then took it off and had a look at it and it looks brand new??
does the dirt get stuck inside the housing?? when you open the 2 torque screws??
if it drove like sh!te with the MAF plugged in and was sh!te with it out aswell then id say it was your lambar senser.....not the MAF