When to get new ECU

Both of those guys it the head on the nail... In fact i don't even like people re-chipping my ecu. I don't really like when things are out of my hands. And especially when i can't see them doing it. Not saying people are ripping others off like that but it just doesn't make me feel too comfortable. The main reason being that it's not made specifically for your car. Could help a little, could even take horsepower away. The Apex'i v-afc and other piggy back's are really your best bet. That way you could tune it to fit your car's mods.