So to confirm:
When the pressure is set lower, it makes a louder sound?
If so, that means your solenoid is struggling to open against the guns operating pressure.
This happens on the ion/epiphany solenoid sometimes because its poorly made.
Nobody except smart parts makes a solenoid out of plastic.
If the gun is new contact the retailer for a replacement board.
If not:
You will need to either increase the dwell to help your solenoid open better.
OR change the insert in your fire chamber, to allow the gun to function at a lower pressure where the solenoid does not have problems.
When the pressure is set lower, it makes a louder sound?
If so, that means your solenoid is struggling to open against the guns operating pressure.
This happens on the ion/epiphany solenoid sometimes because its poorly made.
Nobody except smart parts makes a solenoid out of plastic.
If the gun is new contact the retailer for a replacement board.
If not:
You will need to either increase the dwell to help your solenoid open better.
OR change the insert in your fire chamber, to allow the gun to function at a lower pressure where the solenoid does not have problems.