Hi everybody!!! I would like to ask you a question about engines start up on ground and without using APU system.I start up engine number 1 first successfully but when i'm going to try it with number 2,I don't have enough pressure to do it from external pneumatic or it isn't simulated on fsx. Hola a todos! Me gustaría hacerle una pregunta acerca de los motores en marcha en el suelo y sin utilizar el sistema APU.Arrancar el motor número 1 en primer lugar con éxito,pero cuando voy a intentarlo con el número 2, no tiene presión suficiente para hacerlo de neumática externa o no es simulada en FSX

Ensure the isolation valve is open.You will need to add some power to the #1 engine to increase bleed pressure. Greater than 30ish pounds you should be good to crank up #2.

After starting engine 1, use that engine to start the other one.Turn on engine 1 bleed air and open the isolation valve.