Have an rb25det series 2 that runs well on stock ECU but when plug 20det nistune ECU in that has been mapped for the setup , it misfires and only runs on 5 cylinders . Have narrowed it down to #1 coil plug not getting any signal with the 20det ECU but runs on all 6 with the 25det ECU. Is it possible the coil driver inside the ECU is faulty ?