For what its worth:

A buddy of mine did a B16 swap on a CRX and had this problem. Yeah, I know.. different engine, but I'm willing to bet the computers work similarly.

He had something silly go wrong with his computer (he installed a socket so he could replace the chip easily), one of the pins was bent on the chip or it was in backward. I wasn't there, so I'm not 100% what it was.

Anyway, it put the thing into limp mode and it wouldn't rev past about 3000rpm.

Something to consider anyway..