I see that in my haste I missed your ECU swap. There was more in my post than that suggestion though - stuff that is fairly easy to do and doesn't amount to parts swapping.
I see your response to Farm Boy about having only four injectors on the rail. All of the B230s have only 4 injectors on the rail; the 5th injector is about as off-rail as one can be - located in the manifold. If yours doesn't have the CSV, and you can't tell one plug from another for flooding, maybe you could check the service injector pulse with a noid light, tell us what codes have been set, which model ECU was in the 92 and which in the 90, and one of us will respond with a "yeah, that happened to me too".
-K
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