He changed everything the engine harness, spark plug and spark plug wires including all the boots. What's is weird is when the car lost power after driving at high speed and i come to a complete stop it stalls, i have to disconnect the battery terminal for a few to fix whatever is causing the problem until another 20 miles. If i reset the misfire after i drive like two blocks it comes right back. Cylinder 2 and cylinder 5 don't work the car act up that's why he said it was the ecu and the car is still doing the same thing after we replace the ecu.