Surging, high idle 2003 type s rsx

So my problem started with a surging idle. I replaced the iacv and the problem went away for a few days but came back. Had a friend change the tb, sensors on it, map sensor, and iacv. Now it sometimes surges when cold, but usually does when in neutral and the car is coasting. When it warms up the idle stays around 2k rpm’s and kind of sputters/bounces. Driving in like 1st-4th gears at low rpm’s it is rough when letting of the gas like in the 1.5-3.5k rpm range when letting off the gas it’ll jolt or buck kind of hard. If anyone could help I would really appreciate it.