Any idea what causes this?

I did take carb cleaner and spray all around. Only time it idled up was when I accidentally got over spray in the top of the carb. I turned the fuel WAY down and now it is doing a lot better but still spits and sputters when I punch the throttle. I realized I screw up that I did and am going to fix tomorrow. I set the timing without pulling the vacuum from the distributor and then adjusted the valves after doing that. Yesterday I re did the timing after I unhooked the vacuum and now I have to redo the valves. I was wondering if that may cause my problem? It only does it when I mash the gas to the floor, does great any other time I am driving it.