hello,i have 87 roc lb9 5 speed.car was runnig great until one day i decided to do a throttle body coolant bypass mod.ever since then i have been having idle problems.i have replaced temp switch,cold start switch,iac valve,checked tps and it is fine.the car when cold is supposed to idle high and drop down as car warms up,doesnt do that anymore.idles very low when cold and stalls out at red lights,stop signs.i had to adjust idle screw up to keep it running when cold but when warms up it idles high,its like its working backwards.i think it has something to do with iac valve,i adjusted cleaned old one didnt fix problem so i bought a new one and adjusted(1 1/8)did the ab paper clip jumper and nothing works.sometimes very hard to start and wont idle.HELP PLEASE!!