Thanks, I did get that far and beyond.
I'm going to try to clarify here, in case someone who's worked on this actual specific piece of hardware comes across the question (eventually
-- one nice thing about Usenet, it stays around).
I've looked at the very short list of trouble codes. Note this is not the new system most people are familiar with -- that's why I'm hoping for a response from someone familiar with this specific setup.
I'm aware generally of what an ECU might/could/possibly be doing. Some do a lot.
This one doesn't.
The trouble codes -- for this particular 1988 SPFI turbo engine -- don't distinguish between SENSOR problems (something's wrong) and SETTINGS (something it should be adjusting or changing isn't working).
1988 was a very early year for these; on this Subaru there is only one fuel injector, for instance.
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