I did a b16a swap into my 90 CRX DX and it was running super rich, so I figured out that the timing was way off, the belt went off a few teeth. when I Fixed it, I took the timing belt off and put the cam gears to tdc and then put everything together. The car started right up and then when I went to hit the gas it revs up slowly and backfires alot and wont rev up past like 3000 rpm. I'm throwing a code 9 and 23 I have a chipped Pr3 ecu and a virgin Pw0 ecu but I havent tried the virgin ecu. Does anybody have an idea what could be wrong? The timing is perfect now.