All I have to say is under NO CIRCUMSTANCES you should have bought this car. It was severely abused and has probably developed some serious mechanical issues and was traded in because of those. Also, if the car was already flashed when you bought it, you would not have been able to install your AP on it. Ecutek locks the ECU and so does the AP (if the previous owner had one).
I won't even ask why you bought it because it will make no sense. Very bad decision.