Airflow Performance fuel injection with purge valve
I have the Airflow Performance fuel injection (FM-200) with purge valve and was wondering about what fuel pressure I should see with the purge valve open (flowing). With the engine stopped, mixture full rich, and the electric fuel pump (Andair PX375-TC) on, I don't see a huge change when it's open or closed, about 34 PSI. Same on left and right tanks.
Does this seem reasonable?
I was kind of expecting that the fuel pressure would drop. I unfortunately didn't look at fuel flow numbers, but I'm guessing the reason the fuel pressure remains high is that even though the purge valve is open, the fuel flow through the FM-200 is still quite low.
Thanks for any insights!