Here is a bump for ya cause i actually have a very similar issue, but i adjusted my wastegate and it seemed better for a few days but not now so
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98 RAM2500 AUTO 4X4 12 VALVE!!!!!BHAF, FUEL PLATE AND AFC FORWARD, HOME GROUND 100, s300/s400 TWINS, A-METER BOOST PYRO AND TRANS, 5" INTO 6" MITRE CUT STACK, SILENCE RING GONE ATS CONVERTER AND BUILT TRANS KDP tabbed-timing 16 deg-3GSK, stage 2 injectors