You need to add some more gounds. If I remember correctly, your ECU is not getting a good ground. You can run a new ground directly to the ECU, but I bet it would fix it if you just ran a couple 4 guage ground wires from the batter to the chassis and to the engine. I also grounded my exhaust at the y-pipe to my transmission. With a multimeter, I now have 0 resistance between any 2 points on my car.