Yes get it tuned asap. And in the mean time either turn down your boost or put back to stock.
Best of luck

 

Turn down my boost with my MBC. Well I tried to. It's still max boostin' and cutting out.

 

then you have one of two problems:
1. your waste gate is stuck open.
2. your MBC is not connected correctly. Check the How To section for proper installation.

 

Fixed. MBC was not correctly connected. Thanks for the input guys.

 

NP, glad its working. Make sure you get a tune ASAP.

p.s. Still do yourself a favor and check your plugs.

 

92GSX is right, you need to check your plugs and see how they look. Plugs are so over looked, it's insane. It only takes a quick second to pull the out and check them.

Once you do, you'll probably find that they could use replacing. She'll run much better with a fresh set of plugs and something like the NGK BPR7ES are inexpensive and work great on the EVO VIII.

Good luck with the rest of the project!