wow! a model the only had one engine option. 5M-GE EFI engine. not typical for sure.
there are terminals that need to be jumped and other special procedures. so.....
there's a FREE online only manual for your vehicle that can be found here,
http://www.autozone.com/autozone/homePage.jsp
just sign up, plug in vehicle info, and go to,
REPAIR INFO / 1984 TOYOTA CRESSIDA 2.8L FI 6CYL REPAIR GUIDE / ENGINE PERFORMANCE AND TUNE-UP / IDLE SPEED AND MIXTURE ADJUSTMENTS
shows you everything you need to know.