Motronic

Dave Zug dzug at eecis.udel.edu
Thu Jan 16 01:36:19 GMT 1997


Chris Denzler wrote:

> ...
> So let me ask....Do the gurus approach the task from a software and hardware
> perspective simultaneously, disassembling the code as well as using test
> equipment to figure out what, when, where, and how?
>                                      - Chris

I'm no guru, but before i learned to THINK MORE about what i was doing,
i spent a month taking pot shots at chunks of the data area on the prom,
zeroing out sections that looked "patternish" and using a DIVIDE AND
CONQUER technique on the data. Without the luxary of STARTING the engine
and seeing the effects on a scan tool, looking at scan values got me
exactly confused, but evantually to finding spark table location, and
certainly got me intimately familiar with eyeballing hex and knowing the
decimal equivelant. so heres another vote for not using strictly a
"hardware" method... definetly learn some code. Number ONE step is to
find the checksum.. the program wont run or allow you to use a scan tool
if you change bytes without addressing the checksum issue.

dave~
1989 W body vin-V P4
http://p3.net/89gpturbo.html



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