Lawn, Fertilizer, Weeds

[DKAudio]

I have had my house for a little over 2 years now. I am sure the prior owner did not do any lawn care. The first year I did nothing because of finances. Last year I did a 4 step program...
Crabgrass preventer and feed
Weed and feed
Insect control and feed
Winter blend and feed

This year I put down crabgrass preventer and feed. I used Menards brand again due to finances (it is cheaper than Scotts). I have been doing a lot of research and am finding that weed and feed fertilizers are not good. It can be dangerous to plants and trees and treats harshly. My lawn is pretty thin and has many uneven spots (bumps). The worst weed I get is typically dandelions. My plan is to do these 4 steps...
crabgrass preventer and feed
feed
feed
Winter blend and feed

I have read that a thick, lush lawn will prevent weeds since they can't grow. I am also mowing high leaving pretty lawn grass. I purchased some weed killer concentrate and a pressure pump bottle, pulling off the heads and spraying the weeds. This has not seamed to do much and I still have tons of dandelions. Then I tried a dandelion puller but it never gets the whole root so the weed will grow again.

What should I do?

I live in MN and think I have a blend of Kentucky blue, Rye, fescue although I am not sure.

[Allison1888]

You may want to consider starting over. Harsh, I know, but sometimes it's the only way. Here's a link that can help.

http://www.allaboutlawns.com/backyard/reclaiming-your-lawn-how-to-replace-a-lawn.php

Otherwise, yes, they say you need a thick lawn to crowd out weeds. I'm still trying in mine and it hasn't happened yet. Keep pulling the weeds and do spot weed killer as needed.