I just installed a spoon chip in my P0B ecu. I've got a 95 accord lx (MT) with an f22b2. Anyway, when i put the new chipped ecu in the check engine light came on. In addition, the motor was running rich, so rich that it carbon-fouled the o2 sensor. anyone else have this trouble? Any ideas? I know the fuel and timing maps are changed, but uit seems a bit much.

Usually mods like that will render them non-compliant for emissions purposes, and crap up sensors and set codes like that.

If you can't flow enough intake air through modded CAI and intake manifold, or are backed up on exhaust flow, it'll only amplify the problem.

I'm guessing that chip was not emissions certified?