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Re: ECM #

This got me to thinking, my neighbor has a big block (454) rollback that has a 747, but I didn't pay attention to the rest of the numbers. The thing is it does not have a knock sensor. No wire in connector, so it appears that it never had a knock sensor. I read the bin and the knock tables are zeroed out. It also idles in open loop. I think the bin is anty, have a copy of it at home. 



From: Shannen Durphey <shannen@grolen.com>
Reply-To: gmecm@diy-efi.org
To: gmecm@diy-efi.org
Subject: Re: ECM  #
Date: Mon, 01 May 2000 00:00:41 -0400

Hello, rr.
The 1228747 is typically used in a big block chebby truck, and I've
seen it used with large gvw smallblock equipped trucks.  It's not the
same as the 7747, but I can't tell you what the differences are.
Shannen

rr wrote:
>
> I do believe it is Bruce. I've been holding onto
> four numbers for the '747 (for boneyard hunting):
>
> 1227747    the original
> 1228747    (Not sure about this one)
> 16121154 new service number?
> and
> 16133288, IIRC, a newer version of the '747,
>  possibly a different board inside, but functionally
>  the same.
>
> BobR.
>
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