Clearly you don't have a tuner and can't view how the MAF reads numbers, it makes a big difference when the filter is on the end of the TB compared to a filter that is 6+ inches away, because the air won't see as much turbulance.
I guess you didnt read or havent seen the few threads about people having issue with the filter right on the end of the MAF, just recently a guy had that problem, moved filter farther away and all his problems were gone.
If it was me I would move it away from the MAF, but you'd still need the car on the scope to figure out where the KR might be coming from.