dunno if this works for OBD-0 setups like the one u have on ur prelude but it werks on OBD-1&2 if you pluged the wires for your TPS sensor and your MAP sensor in reverse, in other words TPS plug into MAP and Map Plug into TPS, the plugs are the same on the later OBD1 and 2 setups this happened to me on a gsr motor into an ek swap i did and it wouldnt let me rev past 3k rpm i switched the two and it worked fine, but i agree with what was said earlier there is something wrong with the wiring of the car