Hey guys, I have a 2016 Ford Mustang Ecoboost. I have a Levels Intercooler, Roush Cold Air Intake, and a MAPerformence Catless Downpipe, With no mufflers. Keep in mind I never got it tuned for about 6 Months after all of these mods were on the car. I did not change my Fuel Sensor either. One day my car started to make a awful popping noise on acceleration out of my exhaust like a backfire. It would only happen if I accelerated. It did this off and on and I could not find ANYTHING about this problem. The only engine code that would pop up is a cylinder 2 Misfire. I changed the spark plugs and coils as well, and it still would pop up. My car had a rough idle at this time too and would sometimes have white smoke(not too thick) come out the exhaust after I turned it on. I also had a timing cover oil leak. I was going to get the leak fixed but before I was going to do this I decided to get it tuned. Not a heavy tune just a tune so my ECU knew that it had these aftermarket parts on the car. I was driving it home after the tune and my car started smoking and fire covered the whole back of my car and it went out after 5ish seconds. I pulled over and Oil was all over the back of my car and when I opened the hood oil was everywhere too. When I got the car home I saw a hole in my block and we got the motor replaced and its currently in the works right now. I will get it back Tuesday. What did I do wrong? I understand its heavly user error when it comes to this but my car REALLY isnt that modified so I have no idea how it happened. Any ideas?