Hello C'123, trying to digest your super long sentence.
So the inlet you cleaned, is that the micro sieve where fuel goes into the pump?
Have you replaced the fuel filter after the pipe replacement?
Is the SCV the correct unit? It may have picked up some contaminant on fitting it.
Basically any work carried out post fuel filter really needs surgical cleanliness, as tolerances in the components are super tight and it would be easy to introduce muck when fitting items such as SCV, pipes, etc.
Assuming all is clean up to the rail, that leaves possible muck in the injectors.