just bought a 90 integra gs it has a b18 w/b16 tranny and gsr 4th AND 5th, cold air intake, custom 2 1/2 inch exhaust no cat, short shifter and drop zone coilovers, it has an idle problem, when starting up cold it revs from 1.75 to 3.5 grand and sometimes when at a light it goes from .5 to 1.5 grand my buddy adjusted the TPS and now it does the 1.75 to 3.5 grand at cold start, any ideas what it could be, by the way i just found out my licence is getting suspended so i will have 3 months to work on it, so i got time. please help