Lean Code

[bob12312357]

So my car an 01 A4 1.8TQM is throwing a lean code. Checked the Vaccum lines and replaced accordingly. Smoked it and no leaks. I've got a real good idea of what it is, but to avoid tainting your ideas I'd like to see what you think. Thanks in advance.

[rms-s4]

maf

[rms-s4]

hook up scan tool and take it or a beat run. pay attention to calc load % if it doesnt reach atleast 80% put a maf in it. then throw away what ever oiled K&N filter y0u have and replace with a paper filter

[bob12312357]

then throw away what ever oiled K&N filter y0u have and replace with a paper filter

Damn your good, its a carbonio filter which is even worse as it has gunked up the MAF twice in less then 2K miles one time during a track day, the other time during hard driving. The car was powerless b4 the MAF got gunked and didn't throw any codes until my track day plugged it visibly shut. When it was on its way out would the car have been in limp mode with a slight hesitation due to the MAF without a CEL? I was leaning to the MAF, looks like ya pretty much confirmed it.