New battery on car but no power at all
 

I recently bought a 2000 mustang gt 3.8 v6 and the problem is that when i was driving home it started dying on me slowly. At first it started to lose power when i steped on the gas like if the fuel pump was going bad but i replaced it and the fuel filter asswell. Besides that i know the car needs the iac valve but would that cause it to turn off.
I have only changed the fuel pump and filter, oil change, and new battery with cables and terminals. If anyone has an idea or that can guide me pls.
https://cimg5.ibsrv.net/gimg/themust...76c011d1e6.png
2000 mustang gt 3.8

Does it turn over? Will it start at all right now?

Yes it turns on but it idles rough with the revs going from 800 to 1200 and when i give it a little gas it dies after that when i try turning it on it just gives me a click sound like if the battery died nothing turns on. But if i jump start it it turns on but idles rough untill it turns off.