Hello Terry

Thank you for advice.
Today have opened the regulator to see if is something ( dirt or other ) inside it.The regulator's memrane is OK and I didnt find dirt or other strange.Next saturday will go to the field and do some regulator settings.ONLY!
I'm affraid to "screw" in two places at once.
Hope to solve this by setting the regulator.

I'll follow your steps.

Thank's again!

JIMMY