94 Integra Vtec

When I start the car the idle will start at 2rpm and go to 3rpm. It will bounce back and forth until the car is warmed up. Once it’s warmed up the rpm will drop and bounce from 1rmp to 2rmp. Some times it will stay steady at 21/2 rpms. Most of the time it’s bouncing back and forth. I brought it to have a diagnostic check done. I was told it was my IAC system or valve what ever you want to call it. So I bought a brand new oem part, put it on and nothing. I checked the wiring to see if its getting power. The wiring is good. So I think. I started to check some of the other wiring to see if they had power going to them. The only one I didn’t get was the Intake air temp sensor. My test light didn’t light up. I’m not sure if it’s supposed to.

Well any thoughts of the idle issue?????