Re: 87 to 89 ECM

["Ernst denBroeder" <ernst@employees.org>]

BobR,

Just for giggles this afternoon I swapped in my new '747 in just to see what
would happen...  it runs! (poorly mind you)  The 4.3 cal inside my 747 is
way off for my little 2.8.  Now if I could just pursuade UPS to drop of my
eprom programmer when *I* am home, I can get on with things!

Ernst


-----Original Message-----
From: rr <RRauscher@nni.com>
To: gmecm@diy-efi.org <gmecm@diy-efi.org>
Date: Tuesday, April 25, 2000 9:40 PM
Subject: Re: 87 to 89 ECM


>What'a you bet that it's the mask roms that are different between
>the '7747  and hte '7429. Check the part #'s on the 40-pin chips.
>See if all are the same except for two of them, U6 & U7. If so,
>then the firmware is the difference.
>
>BobR.
>
>>
>> So... just to get a wee bit off topic... what would be the newest '7747
code
>> for a 4.3v6 5spd?  APAB or AKSM?  I'd like to choose the right starting
>> point for my 2.8tbi '7747 conversion.  I've compared my '7429 to my new
(to
>> me) '7747 and they look identical circuit board wise (PCB is same part
>> number, I didn't verify every component)...  anybody know if they are
truely
>> 100% pin compatible?
>>
>> Thanks,
>> Ernst
>>
>>
>
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