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Re: Changed engine, now tranny will not shift.
Curious if you swapped PCM with the engine? Reason I ask is the 3100 PCM is not going to have fueling tables (injector pulsewidths) for that larger displacement. There is some range that it will self-correct to try to maintain O2 sensor signal toggling.
HOWEVER...when you break into power enrichment trying to use that extra displacement you are back to open loop where the injector pulsewidth doesn't get modified (will alter spark to keep from knock).
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