TiggerZ

I have beeb having trouble starting my 88 300zx for the past couple weeks. It would take anywhere from 1 to about 10 tries to start. I get a loud click and it would not turn over. After a few tries it was fine. I went out about a week ago and just the click and no start at all. I replaced the starter myself and it was fine for 2 days and then the click happened once or twice again. Today I tried to start it and I got a loud buzzing sound from my fuse box and starter now makes a really loud clicking noise. I am getting full battery power, but it doesn't even try to turn over - just clicking and buzzing. HELP - this is my only car and I use it a lot for my job during the course of the day.