As I noted, no differences that I have found yet, in fact the '85 FSM makes no mention at all of anything different for the 22RE, but they do for the 22R. Timing seems to be identical (5 BTDC), no extra vacuum dohickeys, etc. Yes, in later years, they added things like a temp sensor on the EGR valve and a 2nd O2 sensor behind the cat on the 50-state engines.

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