Looking for help here. I recently had my bottom end rebuilt So I upgraded my turbo as well (Tomei arms) I have full turbo back exhaust, upgraded intercooler, 550cc injectors and ECU tune And all the obvious Bolt-ons. For breaking in purposes I left the turbo set at stock boost. Whenever I hit peak boost in second or third gear I get boost cut off and a loud backfire. Fourth, fifth and sixth gear hold fine. I’m about to upgrade the fuel pump and move up to 750 mL injectors I’m not sure if this will alleviate my problem though. Any help would be great!