very little info here, does all the power cut out? or just the rpms? or is the motor actually cutting out and ur plugs, dist, everything shuts off? i would check for loose wires first, cuz u say when driving or drifting (car in motion) it cuts out, id go through the hoops of checking grounds,main plugs, battery, and with the car idling take ur harness at all different angles and jiggle it and at the ecu. u might have just a short or loose or broken wire
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