Thought this could be a good idea for a thread, so people can put down what they'll done that didn't work so others know not to try it.
AU v8 airbox hole at
maf is smaller than
maf, so i enlarged the whole leaving a nice straight shot for the
maf, doing this knocks the
maf way out of calibration, making it inconsistantly read higher at some flow points rather than others, causes to car, lost power, poorer idle, excessively rich at 3/4 throttle and very hard to tune cause it was unstable.
Fix replace airbox lid. Run's a lot nicer now!