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        General >> Give/Need advice to/from others >> vacuum valve behind o/s headlight.
        
(Message started by: a900one on Sep 28^th, 2009, 8:33pm)

Title: vacuum valve behind o/s headlight.
Post by a900one on Sep 28^th, 2009, 8:33pm

Now I have found a vacuum valve behind the drivers side headlight, it has 2 pipes and a plug on it. I could hear a hiss just after I turned the engine off, but it seems to be letting in air while the engine is running as well. Is this how its ment to work , what it for. Car is a 98 facelift cosworth.

Title: Re: vacuum valve behind o/s headlight.
Post by scorpio_man on Sep 28^th, 2009, 9:55pm

hi there

a photo would be good. ;)

hth

Title: Re: vacuum valve behind o/s headlight.
Post by gozz on Sep 28^th, 2009, 10:18pm

It might be the solenoid valve for the purging of the sealed fuel system,at set periods it opens and empties the leak off canister near the petrol tank via the inlet manifold.It should not leak.
GOZZ.

Title: Re: vacuum valve behind o/s headlight.
Post by a900one on Sep 28^th, 2009, 10:23pm

I would like to put a photo on but not very good at that sort of task. Now its next to the abs unit and there is a round canister next to it. If I can twist my sons arm I see if I can get a photo.

Title: Re: vacuum valve behind o/s headlight.
Post by Snoopy on Sep 29^th, 2009, 7:57am

Sounds like the purge canister looks a bit like a coke can but smaller from what I remember.

have a look at THIS (http://www.fordscorpio.co.uk/evapmonitor.htm)

Title: Re: vacuum valve behind o/s headlight.
Post by a900one on Sep 29^th, 2009, 7:14pm

I had found that layout but the valve is a lot different to look at. Good news I have found the problem, the pipes to the valve, no 92ac9h456-aa, are different lengths and the connections are also different lengths and at sometime had been put on wrong.
How long its been like this I dont know, its been in for a spray job as he got the wrong colour last time and they might have knocked them off, but no hissing now. Also I cant recall that the fuel tank being under vacuum when I have filled up, so may have been like it for some time.

Title: Re: vacuum valve behind o/s headlight.
Post by Matt on Sep 29^th, 2009, 7:21pm

you should get a hiss when you open the fuel cap, but if the purge canister wasnt piped up correctly it could be that

or

the EVAP isnt working correctly