[s-cars] Early build 92 S4 owners: Question about your ECU PN and chip sockets
David Forgie
forgied at shaw.ca
Mon Jan 3 11:15:07 PST 2011
The full ECU PN is 4A0907551A or 4A0907551AA. I am trying to figure out when the switch from
socketed ECU boost and timing chips to soldered chips occurred. Rumour has it that the 551A is
socketed and the 551AA is soldered. This probably only applies to the very early months of 1992
S4 production, i.e. Aug, Sept, Oct. 1991.
ECU photo:
http://12v.org/urs/4A0907551AA_MotronicECU.jpg
ECU access instructions for the curious (who haven't found their ECU before):
http://12v.org/urs/JimmyPribblesECURemovalProcedure.pdf
Any info will be appreciated.
I am hoping Bob Myers and/or Steve Eiche might have some records of this.
Dave F.
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