While I'm driving there's a knocking sound in the front left wheel

I changed the fuel pump, and it still wouldn't start. Checked the fuel relay and it's good. Spark plugs are still good. What could be the problem?

My car has been sitting and parks for six months I want to jump it and as soon as I put it in neutral and tried you park it into a difference but it did start the next day I turned over the key the windows rolled down but would not start now I am on able to roll my windows or start it what should I do

At one time the lights STAYED on, even when the keys were removed from the ignition. And now they do not come on at all.

We changed fuses computer alternater there was no curent before we did the work we can not get curent now as well what Ella can we do or wars the problem plz help

together if needed.

How does a rebuilt or used engine cost for a 1998 Nissan Altima?