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If using haltech then what other wiring will be needed from a 4cyl mx3. Im trying to collect info for this swap and im having trouble.

You need the main fuse box under the hood, the alternator, starter, and battery harness which should be all in one. That's the only harness you'll need. The main harness from a 4cyl (from the computer) will have to be cut so you can use the TPS connection and the idle air control valve connection.

thanks jaydawg i was hoping you have the answers because it seems like you know more about these cars then anyone. Do you know anything else thatll need to be swapped. I know ill have to get a parts 4cyl for the engine mounts, radiator and hoses, then id get the pro lx tranny, axles and tranny mounts. Is that about it. i really wish there was a write up for this swap. thanks for the help.

Click the link next to my signature. That should answer some, if not all of your questions.