ahh...P0757 strikes again...

Take it back to your tuner and have him turn that code off.

Search on here for P0757, you'll find lots of threads about it. It gets triggered because of differences between the stock convertor and aftermarket one.

 

Now see how easy that was once you found out what the real code was instead of geussing

 

damn i hope i don't have overheating problems. i don't know about mounting it in front of the airdam, it wouldn't look to good after landing but should work.

 

I had a DRC 4l60e (local rebuilt trans), and some problems with my pcm that I never figured out even till now, and that trans got up to 255 degrees a few times. Never threw a code. That trans burned out after a couple hundread miles, but the pcm didn't do anything to let me know it was getting too hot, but that didn't matter because I knew how hot it was from my AutoTap.