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Jeep Wrangler YJ
YJ General Discussion
ECM Problems
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<blockquote data-quote="machoheadgames" data-source="post: 441812" data-attributes="member: 18789"><p>The XJ and YJ can interchange, however with the YJ automatic it gets a bit weird. Does the 4 cylinder 94-95 have torque converter lockup? I forget but I think it doesn’t? Any relay mounted on the firewall? If not then no big deal, but the 4.0 for sure has TC lockup and requires the 94-95 pcm to lock it up. If the 4 cyl doesn’t have it, then any 2.5 91+ OBDI SBEC-type PCM will work.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 441812, member: 18789"] The XJ and YJ can interchange, however with the YJ automatic it gets a bit weird. Does the 4 cylinder 94-95 have torque converter lockup? I forget but I think it doesn’t? Any relay mounted on the firewall? If not then no big deal, but the 4.0 for sure has TC lockup and requires the 94-95 pcm to lock it up. If the 4 cyl doesn’t have it, then any 2.5 91+ OBDI SBEC-type PCM will work. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
ECM Problems
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