George, if you want to send me a pm ( private message ) with a valid email that can take attachments, I have a .pdf that shows the evolution of the EJ engine from 1990 to 2004. So it's dated, doesn't cover variable valve timing, but does cover quite a bit of information.
Unfortunately, Subaru never made a document like this for the older EA engines from the 70's thru the early 90s, nor did I ever see an update for it. But for a mechanical, inquisitive person, it contains a world of information.
Fly-by-wire, as Silke already stated was intoduced on the 04 turbo, then on ALL 05 and on Foresters.
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04XSPP(7 Subaru's since 1978 All 5 sp)ILuvSubaru's
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