recently bought 98 diesel and heard from various sources about 2wd economy but since doing this as soon as i got the motor its only giving about 25mpg round town. somebody at local l/r place where the mrs delivers suggested a gearbox swap for rover 216 to do away with ird altogether....the other thing is that the motor runs as normal with the airflow meter disconnected (came about by accident) can this be whats making the motor sluggish or are they like this anyway....as a new boy to l/r i would be grateful for any help or infomation...thanks