OK James so what does that $800 include?

My understanding, if it is plug and play, is that it would include a socketed OBD1 ECU (though which one would be compatible for my car, a '96 Accord, i dont know) and an OBD2 to OBD1 conversion harness only? Cos anymore than that wouldn't be plug n play.

The question also is, would this be legal to do on an OBD2 car, since OBD2 should in theory have less emissions than OBD1.

Of course a third party device cant tell the ECU whether to be in open or closed loop, it is in closed loop during certain throttle conditions and open during other throttle conditions.

However during closed loop it would still be possible for an interceptor to modify the MAP signal to give the ECU the signal it wants, yses? I mean if this is not the case, then how are so many XR6-T's, for example (which are supposed to have very compliacted ECU's) being controlled by stupidly simple interceptors like Unichips? I dont know whether this is correct or not, just posing the question and looking for answers