I have a clog somewhere in the fuel line and my car wont start. I replaced the fuel filter(which was really dirty and could barely breath through), and the fuel pump is newer and I can hear it priming. Looking to see if my problem lies somewhere past the fuel filter towards the TBI. I wanna disconnect the fuel lines at the TBI to see if fuel is actually making it to the TBI, or if there is a clog in the line somewhere. There is 2 lines that look like the same size connected to the TBI, so I can't tell which one, if any, are a supply or return line. The car will start up temporary when I spray in some starter fluid but will not stay running. Any thoughts?

If I remember correctly, the fuel feed is on the drivers side. Someone please correct me if I am wrong. You need to verify fuel pressure and do this at the TBI after the fuel lines.

Did this happen all at once or gradually get worse till no start now?

You could have stuck injectors (not likely)
You could have bad injectors drivers in ecu (not likely)

Why are you posting in the carburetor section?

The supply is the 3/8 line return is 5/16. You should check fuel pressure iirc 11-14 psi . You should also use a noid light on the injector pigtail and test for pulse.

fatter one is always the source, smaller is the return

odd question though, how full is the tank? I dont ask because i believe you are out of fuel, but more because i had this issue once where the little hose between the pump and the line assembly in the tank was rotten/broken, i didnt have access to the bottom 1/4 of the tank, but i could still hear it prime etc