Santa fixed my code 0 and 3000 rpm rev limit on 12-24-2002 all the way to 12-25-2002. It worked fine with both ecu's, the codes were gone and it reved past 8000 rpm just fine, till today! The code came back

Don't know! Total mystery :dunno:
I didn't do a thing!
At least this tells me that both ecu's are good and that the problem is elsewhere.