Breaking up when building boost?

[1SIC1Gb]

I am having a problem when i am building boost (only when i go WOT out of boost) as it builds it cuts out and sputters for a few seconds then runs great. Looking at the A/F est you can see when the car is sputtering as the a/f is all over the place while the car is building boost.

I have tried tracking the datalog and lowering the a/f at the problem points but it doesnt seem to help?
I just swapped out my side mount for a hotpipe . Not getting much if any knock though i know its getting a lot more air .

Any input appreciated.

 

[c2ypt1c]

It can be a number of things. However, I suspect it is related to your dtc:0012 (volume airflow circuit malfunction). This might be the wrong place to post for this sort of thing because "tuning" won't solve a mechanical issue. Also, for future reference, please read/perform this checklist that Mr. Calan put together for us all. (On a side note...get a wideband!)