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What is it ?

Frenchy

Frenchy

New member
A small sensor / valve with two small outlets just to the rear of the cycling valve on a 944 turbo towards the bulkhead, mine has nothing hooked up to this, I believe that it connects via a vacuum tube to the bottom of the throttle body ?
 
Hi Jim

Not totally sure but if we are talking about the same thing, is this not the valve that connects to the evac system for the carbon canister? Mine is also no longer connected as I have deleted the carbon canister along with it's associated parts...

Pete

 
Both our 924S's have this thermo switch fitted into the vacuum circuit controlling the emissions /graphite canister arrangment.I've never wondered how it works but presume it shuts as engine temperature increases (presumably as most excess fuel emissions occur when engine is cold .

 
That sounds about right though my car (88 Turbo) does not have the carbon canister set up so guess it feeds (recirculates) via the throttle body until warm ..........sounds plausible ?

 
Frenchy said:
That sounds about right though my car (88 Turbo) does not have the carbon canister set up so guess it feeds (recirculates) via the throttle body until warm ..........sounds plausible ?
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Hi Jim

I'm not totally sure what the vac line to the throttle body does, or should I say I can't remember. I don't think it has anything to do with the carbon canister. If I manage to remember tomorrow, I'll ask my son, he may be able to give an answer. You say that your car doesn't have the canister, did you remove it? I thought they all had this system. Also if you don't have it, where has the fuel vent hose that comes from the tank gone too...it's a metal pipe fixed to the bulkhead, usually this would have a flexible hose that goes to the vac diaphragm system sitting on top of the passenger inner wing which then goes through the wing to the cannister. I run a hose from that pipe down the driver's wing under the windscreen washer bottle and fitted a filter on the end, put it as low as possible to stop the smell of fuel inside the cab

 
Nope no carbon canister on later cars Pete, my 86 had this but not my 88, my mate's 89 does not have it also, not sure where the vent hose from the fuel tank is, but I am sure it will be vented.

 
Frenchy said:
Nope no carbon canister on later cars Pete, my 86 had this but not my 88, my mate's 89 does not have it also, not sure where the vent hose from the fuel tank is, but I am sure it will be vented.
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My 1991 has the carbon canister[8|]

 
Pretty sure my 90 does have it, certainly has a pipe disappearing into the inner wing, its been a while since I had the arch liner out but fairly certain it was there.

Tony

 
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