Vacuum take off
Right lets get this sorted once and for all lol
Below is a pic of an inlet manifold fitted to the z22se as you can see in front of my fingers there are 2 vacuum take off pipes.
On the vectra 1 is used to operate the heater flaps inside the car and the other can used to operate the FPR (fuel pressure regulator) (if you have carried out this MOD?)
The 2.4 inlet has wait for it NONE

:roll:
So what Vocky is surgesting is to replace the servo one way valve pic below
with one of a corsa or astra which has a vacumm take of pic below
so you can use this to operate your heater flaps inside the car or your FPR or if you need to operate both you will need the valve with 2 take off's (sorry no pics but as above with 2 take off pipes)
Hope this helps cheers..