meltedpanda,
I found the culprit for the rest pressure drop.
I swapped back the old FD and guess the pressure stays in specs but now I can not start the engine again.Should I richen up the EHA a little and then try or try to mess with the air screw(on top of air filter).I have a Duty cycle meter.Do you know how it is done?
Checked also the idle speed control valve and it checks out.
Thanks!