You are probably getting the jerk because all your boost air is going out to atmosphere and none is being diverted to the turbo to keep it spooling, and the jerk is compressor stall. This is exactly why turbo-ed petrol engines have BOVs, to perform this function.
Set your BOV at 50:50, or 100% Bypass, but NOT 100% VTA, unless you have already established a VTA fuel cut in your ECU programming.
There is NEVER any need to discharge the battery. The purpose of DISCONNECTING the battery for about 15 minutes is to initiate a new ECU "learning" cycle. This does not mean, however, that the ECU will somehow learn to compensate for serious technical blunders or mechanical failures.
CP_e Standback & PNP; CP_e 3" SS Downpipe; Corksport FMIC with Top-mount K&N filter & OEM Ram CAI; Turbosmart BOV; Dashhawk; Prosport Boost Guage; JBR solid shift bushes; DBA 4000 Wiper-Slot front rotors; Hawk Ferro-Carbon HPS Street front brake pads (@ 69,000km); Sumitomo HTRZIII's in 225/45 x 18