just another shot in the dark here, but have you checked your timing? my buddy had an afc and converted to uberdata, he had his timing set from when he had the afc in, i told him to set it back to stock, but he did that before he '0'd out his afc settings, so his timing was still really retarded. we were having the same problems as you, the car would not idle and sputtered like crazy, we couldn't figure it out, finally, he got pissed and just turned his dizzy advacning (really going back towards stock), and the car ran perfect :P

 

i set my timing back to stock and my car runs great.

i see that it says solved at the top, what was the prob? chip or timing?