BBC AKSN

[Jason Weir]

Well that may be but the bin file looks awful like the 7747 stuff and
the program code from 0x617 on is byte for byte the same as all the
other 7747 bins that I tried.... Can anyone verify that AKSN is from the
7747?

David A. Cooley wrote:

> Jason,
> Sounds like the AKSN chip is meant for a different ECM than what you
> have...  Possibly some inputs/outputs that are being fed from
> different
> sources on the ECM that cal went with.
>
> Jason Weir wrote,
>
> >As for the symptoms... They are exactly as you describe, like the key
> on
> >- off - on...... Like I said before if you look at the injector you
> can
> >physically see the fuel stop totally....The oscillations must be fuel
>
> >related because I still have good spark during this (verified by
> timing
> >light on coil wire) and the IAC isn't moving but 1 or 2 positions
> either
> >way.  Also while looking at Diacom during all this I get all kinds of
>
> >weird things showing up like battery voltage dropping to 3.5V or
> going
> >as high as 25V but DVOM hooked to battery says 14.3V steady.  Plus
> when
> >it dies I get sporadic codes that diacom shows for 1 frame while it
> is
> >stalling then they disappear once the engine has stopped, they do not
>
> >get stored, as I said if I didn't have diacom I would never see the
> >codes...I would normally think that is was a ground or ecm problem
> but
> >it only happens with BBC AKSN.  I have not had this problem with any
> >other chip... If anyone is interested in seeing a diacom file of
> this,
> >let me know, I can send it...



--
Jason Weir
88 Wrangler - 258 Chevy TBI
Fayetteville, North Carolina
http://home.att.net/~jweir  --- Jeep Home Page
mailto:jweir at att.net