XJ to YJ Engine Swap, PCM Swap Necessary?
I'm buying a 93 YJ which had an engine swap with a 94 XJ. Do I need a 94 XJ ECM to install in the YJ to run the engine or will a YJ ECM work on the XJ engine?
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The PCM does not know or care what vehicle the block came from. If your YJ sensors, intake, exhaust, and distributor (anything else as needed) are installed on the XJ block it should run.
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