Why is patches of my Lawn STILL Yellow After doing all these things?!?

I think maybe you should get some topsoil and put there and replant the gr on the new topsoil. There might be a possibility that there are a type of bug killing it. ( I recommend going to your feed store and tell them about this and they will get you hooked up with the right thing ). My neighbors gr looks just like you are describing yours to be. I don't know what's wrong with theirs either. Ours is really green and theirs is yellow. Maybe the sun is scorching it. ? ..