I just installed the Hallman pro rx boost controller and now im getting Fuel cut at 4.5k with engine light. I "T" it off at the BOV line and capped off 4 nipples. Any help or suggestions would be great.

 

get a tune

 

Check the code. If it says something like "engine overboosting" - you need a tune

 

check to make sure you got the lines right going to the waste gate actuator and coming off the BOV. I have a Forged BC and the nipple on the bottom of the whole assembly goes to the BOV. Other one goes to the WGA. Also make sure you left the stock BC solenoid plugged. Otherwise send pics so maybe we can diagnose your setup. Good luck!