2000se should still be under warrantee no? I don't know if you can self diagnose this ecu but if you can ,do it yourself or a mechanic with a snap on engine analyzer can tell you what's exactly wrong with it without guessing and spending money on parts. getting the Fleet Service Manual is a great investment cause you learn and save. computer diagnosis cost 40 bucks out here but my 91 se-r does the same for free in abot 3 min.
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91 SE-R,10:1 comp.pistons,balanced &blueprint rebuild.comp.4angle valve job,extrude honed heads/intake manifold,No emissions.crap,RC TB/MAF,nismo cams,UR pulleys,stillen4-1 ceram.header,nismo/centerforce dual fric.clutch,PR CAI,2 1/2 test pipe,mandrel 2 1/4 superturbo ex.,and a whole bunch of other goodies! boost is in the works ,hell yeah 3:16!