Most common problem with these cars. Very seldom is the injector pump itself involved as the actual fault.

Always change the secondary fuel filter first as you have done. Unless something else is obvious.

This scenario will eventually occur with all of them if the fuel system does not see maintenance. Periodic maintenance is cheap to do and pretty easy. A quick check every thirty thousand miles is probably enough. .

I define it as a fuel system tune up. Even the factory service manual advises it.

This drive it till it fails in some way costs power, milage and can have an impact on reliability. Also it shortens starter life and battery life by delaying the start up when the fuel system is in a sub standard condition on some examples.