spik 87 trubo 2

Its long but please try to help meout


Ok earler today i used my multimeater to adjust the tps
on my 87 rx7 turbo 2 it used to idle at 2k and now it idles at 1700-1800 it kinda revs its self between the two. Well i have heard and read that i can adjust the bac to adjust the rpm seting also but that just suposte to be used for fine tuning at least that is what ive been told. Also the car will not keep running until it warms up and now that i have adjusted the tps it sometimes doesent even keep runing without me holding down the gas. It feals like its running to rich but how do you tell if it is caus if i turn the car off after it warms up it will not start like it flooded or something.The cars exaust also smells rich . I dont know what to think but if any one has any ideas please enlighten me i can take all the help i can get on this