Fuel pressure problems?

It does sound like the fuel pump is failing but it could be a clogged catalytic converter as well. These guides can help us see what's going on:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Fuel line pressure
0.42 - 0.46 MPa 4.3 - 4.6 kgf/sq.cm, 61 - 66 psi

Fuel hold pressure
More than 0.176 MPa 1.79 kgf/sq.cm, 25.5 psi

and

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Here is how to replace the fuel pump, the fuel filter is on the end of the pump. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.