4age hitting gas too quick means engine stalls - what is the issue?

[Ryo]

I don't think the issue is there we already tried this. And we already know that disconnecting any vacuum hose have not affect on the issue either. So i am lost what to check now. How should i proceed further? Also i forgot to mention that if i start the engine it happens that it get to 1500rpm and than it slowly stalls to zero unless i move on AFM the flap. Not sure what this means. But once i get it to stable rpm and hit the gas quick it just hesitates. Slowly going to higher rpm is ok. I don't have any special measuring things so i have no clue if i got right fuel pressure or if the engine got good compressions fact is it sucks air really strong so the flap on AFM should get open automatically without my help. I was not dismantling air inteke manifold to look for butterfly valves condition but if you will say the issue might be there i will try to clean it. Just have no idea how much this affects the existing issue.