AlexNor

Hello, i have a 2012 530d n57 wich is tuned and has ben for about a year, recently i got a fault code for drivetrain under acceleration next day car would not start and i get fault code for «rail pressure to low» turned out to be bad injector nr1, i get this chaged, now car starts but goes in limp mode under acceleration and the same code comes i have changed the sensor on both sides of the rail and on the hppf as well as injector 5-6 as 6 was leaking and 5 got a bad reading but the car still goes in limp mode, do i just change the last 3 injectors and hope for the best or is there some other better way.

anyone had a simular issue if so please help thank you?