95 nissan hardbody | starts and stalls while idling within 10 seconds

Okay so I bought this 95 hardbody 2.4l 2wd with 322k miles on it, everything is stock and everything works (worked perfectly until 2weeks ago) I’ve owned it for almost 2 months, ran perfect the first month even put about 1200 miles on with a new oil change before this happened, then the idle one day started acting up idling at 1900rpm then would drop to 900rpm, changed the cap wires and rotor and plugs and nothing changed, changed the MAF and still nothing, cleaned the butterfly and any visible gunk after the butterfly and nothing, checked the fuel pump and it works even change the strainer because it looked a little dirty and nothing, changed the TBS and nothing, changed the idle air control valve twice annnnnddd nothing, the idle has only gotten worse after changing all of this, it now turns on no problem idle goes up to 2k when it cranks on then drops and surges at 300-500rpm for 3-5 sec and then stalls and this repeats every time I turn it on but when I do spray carb cleaner over the idle air control valve the idle increases and will stay on but idle at 1300-1700rpm as long as I’m spraying over the iacv, I’m no mechanic but I do have minor experience but this problem if causing me problems (money and transportation wise) also NO CHECK ENGINE LIGHT Has turned on, if I stay on the gas pedal basically pumping it every 2 sec it will keep running and it will drive good with no idle issue past 3000rpm but feel like I’m on 3 cylinders when I’m accelerating heavy and feels like a misfire erratically every 4-6 seconds while cruising on the highway or street going normal speeds.

if anyone has any advise on what this problem would be I would strongly appreciate it!!!!!!

plus two different mechanics said it’s hard to tell with no check engine light and that it would take a lot of time to find so they didn’t want to try. 👎🏻
I also put 91 gas and sea foam and NOTHING!!
Help me…HELP ME PLEASEEEEE!!! 🙏🏻