Ok I replaced my spark plugs twice with ac delco platinums and replaced the wires and coil pack again. The spark plugs I replaced twice as well as the wires replaced the coil pack once. I replaced the coil pack once before do to a misfire on three cylenders but now the misfire on the first one recently poped back again. it is getting annoying to be honest I am not sure what to do now. I replaced the plugs and gapped them and not sure why it is misfiring.

 

Check injectors for that cylinder