747 wiring questions.

[Bruce Plecan]

1227747s are all wired the same way, it's differences in code that cause the
outputs to be active or not.
4.3 Z I thought was the 1227749 (syclones),  course there might be others,
jsut those numbers for ecms have been confused before
Bruce


> OK, 747's been grafted into the crossfire injection system for a while now
> and running fine.
> A couple of smog wires left over, but not a biggy, figured I'd figure it
out
> later.
> Anyway, I'm re-going thru a book on Chevy fuel injection and it list a
> pinout for a 4.3 with designation "Z" (1227747?).
> Anyway, it list  A3 (not used in GM my pin chart) as canister purge and C1
> (also not used in my chart) as Air diverter solenoid.
> The question is, does GM have functions in all 747s that if not used are
> just not wired? If I wire it presto bango do I have my smog stuff
back(like
> I want it :-) ). I know the Non A/C P/U I got my pigtail from didn't have
an
> A/C wire, but I assume (?) if I grounded that terminal that the ECM would
> adjust the fuel and timing etc as if I did.
>
> Kevin R
>
>
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