Message: This may vary by year and motor. For example, for my '00 4.7, the Fed version only needs to see inputs from one cat; while my Cal version needs to recognize inputs from the two precats instead. Its possible there could be some other programming differences as well; but I don't have any info on that one way or the other.
Lead, follow, or get out of the way
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Subject: Fed vs Calf. PCM
