My 95 lincon mark vii will take off fine up to 30mph then starts chuging

What is your question?

Also once it starts chugging u pretty much have to put it to the floor and it will die some times after its started and running and it happens when i drive but if I take my foot off the gas it won't die? I don't know what els to do i just replaced the coil packs spark plugs and wires thinking that was the problem but it wasn't any advice helps and thanks. What seems to make the problem better or worse? Its worse when its hot but runs really rough cold How long have you had this problem? About 1 month