hello, i have a problem with my car, it didn,t rev properly and make some faults when reving or only start and stay at iddle but not rev more dan 1800rpms, i found dust on my fuel tank, and i clean it replacing the fuel lines, fuel filter and i changed the fuel pump for another one i have, i also cleaned the inyectors, and know it only makes the fault acelerating on full trothle its like a no fuel for a second and continue reving properly.
what could be? maybe the fuel relay?

What engine is it?

sorry i forgot saying! its a 360 glt 3 doors, i try this evening other thing and the issue is arround the electric system of the fuel pump it runs but, makes lots of noise, i try fitting directly to the battery and now it doesn,t make so much noise, and runs ok, but where its the problem??? relay?? wiring?