Pin functions determined by PROM?

["D. Barry Stubbs" <z24man@earthlink.net>]

Can a PROM change the function of the input pins on the ECM?  Last night
I dropped in a PROM for a 3.1 auto into the 7730 for my 2.8 5spd, and I
noticed a few odds things happening.  It seems that the VSS doesn't get
to the ECM, causing stalling problems on coasting and DTC 24.  I can
possibly understand this because the PROM was designed for an auto, but
it also can't read the A/C pressure transducer, so no A/C demand nor
clutch control, either.  I dunno how it would have handled the lack of a
digital EGR, but since the VSS never made it above zero, I'm guessing
that I would not have have found out.

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D. Barry Stubbs                                    http://surf.to/z24man
(912) 745-9429                                     AOL IM: thez24man
z24man@earthlink.net          BNet Member #828     ICQ #5409648
#101DSP MidGa Region SoloII   94 Q4 5spd Aqua Z26  88 2.8 5Spd White Z24