Popping can be caused from a few issues. Firstly, exhaust sealing. Secondly, state of tune - get the tools (Guzzidiag/cables - TB balancing kit) and learn how to use them and use them. Thirdly,when you have confirmed the state of tune, reset TPS, correct clearance on valves, cleared learned parameters and the problem still occurs, contact the knowledge on this site for further advice.
The How To for all of this is elsewhere on this site. Go searching.
Booster plugs add fuel to the mix and prevent the whole fueling system from working as designed. Maybe a new ECU map is needed - has there been an upgrade of the ECU map in the past, if so what/who?
Get it into a known tune state first, before going further. This gives a baseline from where you can proceed.