ignition timing is spot on.
TPS measures out ok.
if it is a vacuum leak (which I won't deny as posisble), i'd think it must be pretty small b/c it does idle ok, just needs to be a little high to be comfy.

With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
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'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah