Starter works but will not crank engine

Hello,
My car will not start. Last week it started great. Yesterday I tried to start it and the starter would work but I only hear the exhaust pop once or twice then no crank on the engine at all. The starter continues to try and turn the engine but that is all I hear.

I have replaced the battery and it drained down but, even with a jump the starter turns but no engine crank. I have tested every fuse that I know of and I can hear the fuel pump working. I seem to have good pressure at the fuel rail so I am unsure what may be going on.

I would also like to mention that even spraying starter fluid into it I get no crank. Only the starter.

Any help would be greatly appreciated!