Had to take time off for surgery. Everything went well so I'm back to it.

Got the FD on and tested it. The engine ran at 6.1 to 6.2 bar, but really rough. Had to adjust the HEA and got 5.1 and 5.4 bar. The book calls for 0.4 bar.

Is 5.1 bar enough pressure to run this engine? How do I raise the pressure?