jw if any one knows what are some things that can cause spark cut

 

fuel cut? check boost leaks

 

no its not getting fuel cut its losing spark and running rich

 

i would say bad coil or wires

or bad engine ground

 

what heat range plug are you using and how much boost

 

ngk bpr7es and about 20 psi

 

obviously try new plugs first, but what are the conditions of the missfire? rpm, only under boost?

I used to have problems with plugs backing out of the head which would cause misfire issues in that cyl.

Wires, plugs, coil pack, too rich via afc or bad fpr. Lots of things really.

 

it only does it under boost at about 4500 rpm the plugs are less than a month old

 

Check to make sure the plugs are all tight in the head. Sounds like one may have backed out in that month time. That's what I would do next as its free.