Originally Posted by jspaeth

I am gonna throw in some new plugs soon and see what works.

Grounds are better now than they were before, when it was working. Going to check my igniter chip too.....again I believe it is probably fine because it always worked before and all cylinder fire fine except for under boost.

I think 5000 RPM+ is okay under light load, no misfires....just high load.

This leads me to believe it is weak ignition/blowout/fucked up plugs.