Miracles of 95th gasoline - Toyota Corolla Levin, 1.6 L, 1995

I didn't think the car would be so sensitive to 95 gasoline. Before that, it was pouring 98, but here it was not at the gas station, and the tank was almost dry. Well, I filled in the top ten on the 95th.
Now, when switching quickly, as well as if, under any driving / parking conditions, when the gas is released, press it again sharply - in the release, such non-weak pops are heard with the subsequent clatter of fingers (detonation?) Why is it interesting with a sharp press on the gas and low revs. There is no such thing under load ...