EGR valve modulator ?

[Lon]

93 kick , 1.6 , 16v, 5speed Thorley header.

Not knowing what the P.O. has done or not done , I put a wire into
the "P" & "Q" vacuum line nipples of the EGR modulator looking for the
" short" side (P).
There is no restriction on the "p" side like the diagram in the service manual shows.(Diagram can also be seen on "FIXKICK EFI-sensor- theory under EGR.) The wire goes in one end and out the other. should there be a restriction at the "P" end ? Is my modulator ok or junk?
The diagram is not real clear.
Thanks again
Lon

[Lon]

helperbee

I understand how the modulator works and that is why I asked the question..............If there is no restriction ( orifice) in
"P" or "Q" , how can the valve be Directional? My valve has no orifice.
Thank you for the reply
Lon

[fixkick]

this size engine , it has no orifice, ive checked like 20 of these and all are no orifice
and are symmetrical.
so p and q don.t really matter. that is my assumption, but would never tempt fate, and do it wrong.

maybe one side is more sensitive ? naturally.
the maker has no white papers on it, so can read them. if found would be in Japanese, so.. doomed. to start.