95 grand am v6 missing

My car misses really bad and i dont know why and its not the spark plugs, coil pack, or the fuel system. I check the engines vacum as well.?
I did have a cracked radaitor but its now fixed

try changing you o2 sensor, most likely you are running too rich and your plugs cannot spark all the extra fuel

Is your check engine light on? If so go to autozone and have them read the code/s for you.

My father thinks i have bad gas in my car but i refueled and it dosent seem to work either