Problem with idle. Pls help!

HELP!!! Can anyone PLEASE help me with my Jimny from 1999? Recently, it started fluctuating wildly while idling. First normal for a moment, then suddenly it misfires a bit. It starts wobble terribly and eventually cuts out. After seeking advice online and from the local garage, which is completely at home with Jimnys, I removed my throttle body to clean the idle control sensor and throttle body. And I also blew out the intake manifold with carburetor cleaner. But after those actions, no difference. If I use the paperclip method to read the car's error codes, I get error 21, which according to the internet should be the MAP sensor. I replaced that sensor, vacuum hose and all. No change. I also looked for air leaks. A hefty can of brake cleaner later, found nothing. I would really like to take it to a garage, even though I am a mechanic myself. But they don't all have availability until May. So if I can do it myself in the meantime, I would gladly do so. But I absolutely cannot figure it out and I'm going completely crazy about it 🥲. CAN SOMEONE PLEASE HELP ME GET STARTED! Thanks in advance!