Reprogramming Stock ECM PROM Unit

[Steven Buchholz]

Well, the response to the post on the Lotus Esprit was so informational, 
I thought I'd throw my case out to the group.  First an introduction ...

My name is Steve Buchholz, and I am an electrical and systems engineer 
working for a company called KLA Instruments in San Jose, CA (USA).  I 
have been lurking on the DIY-EFI list for a little while, and I found out 
about the list thanks to Joe Senner.  I own 3 vehicles that employ elec-
tronic controls, one BMW motorcycle and two Audi cars.  The motorcycle 
uses the Bosch Motronic system, w/o OXS, and one of the Audis uses a mod-
ified Bosch K-jetronic ('83 Quattro Turbo Coupe), while the other a more 
standard KE-jetronic ('88 5000 Turbo Quattro).  I have some experience 
with troubleshooting the automotive systems, although I have not attempted 
to reverse engineer any of the three.  I hope that over time I can be a 
worthy contributor to the list, and if anyone does have any Audi-specific 
(or probably VW as well) troubleshooting questions I may be able to offer 
some assistance.  I have the small format Bosch Automotive Handbook with 
me at almost all times, and I also have copies of the Bosch K-jetronic and
KE-jetronic pamphlet/books.  I'm a little less informed on the Motronic.

My question ... has any of the members of the DIY-EFI list done any rever-
se engineering of the systems that are used in the Audi turbocharged cars?  
If so, have you found any useful references for doing so, and how difficult 
a task was it?  Are there any sources other than the dealer for acquiring 
replacement ECUs for troubleshooting?  Any information will be gratly 
appreciated.

Thanks!
Steven L. Buchholz
s_buchho at kla.com
San Jose, CA (USA)