ihavea 90 dx hb with a b16 and endyne chip. ever since i got it it had bouncing idle at start up but then it would go away.well after driving it and putting some miles on it, it ould start bouncing real bad at idle, (like the engine compartmet was heat soaked).so ive took the iac off and found that ih only had one bolt in it because of the bolt pattern(maybe off accord????) so i put snotheer one on seemed to help but then it came back. so i took the one of my other 90 dx with d15b vtec and slapped it on, helped but still comes back after ahrd driving. my last effort is to check the timimg and slap another iac on. any help if u kno thanks also are obd1 iac com[patable with obd0 stups?