Vacuum switch - water valve

95 Disco 3.9 V8Efi
Can anyone tell me where the vacuum pipe from the water valve switch should go to?. It's the one arrowed in the picture.

And if it goes in the back of the plenum where does the fuel pressure regulator vacuum pipe go?

I don't have this water valve but the fuel pressure regulator vac hose goes to the rear of plenum the connection nipple is just below the stepper motor.

pressure regulator cant be disconnected ,but any vacuum pipe or connection on ram pipe housing can be used

Thanks Discool

I have the FPR connected to the plenum at the moment, but this other pipe bugs me, I'm wondering if there should hsve been a T-piece. I can't find anyone else who has the switch. It is in Microcat and Rave so it's not something that's been added.

James

I can't find another connection.

its not a standard part ,been fitted with lpg kit presumably to cut coolant to heater but wouldnt think it necessary theres enough heat in cold water to vapourise gas,there are other connection on ram pipe housing and adpters available as lr part, also vac feeds near throttle cables for cruise control ,would have gone to t piece

I think I have found the answer!!

I assumed it was a standard part as it is in Rave (see pic). But the Rave section on heating does not differentiate between engines, I think that this valve was only fitted to Mpi engines, can any one confirm this? If this is the case I shall probably remove it, I bought plenty of hose when I was changing the head gaskets.

definately not fitted to v8 or 300 tdi

Thanks James. Problem solved, it is coming out, no point in having unnecessary stuff under the bonnet. What is there as standard causes enough trouble!