Fuel tank pressure retention valve (gravity valve)
#1
03-23-2011, 11:14 AM
Fuel tank pressure retention valve (gravity valve)
Hi, can anyone describe the workings of the fuel tank pressure retention valve (or gravity valve) on the petrol tank of the Audi a3 1.8T
What causes the valve to open?
How is it activated? Mechanically, electrically, via vacuum?
What might stop it working properly?
I am trying to debug a build up of pressure in my fuel tank but nobody seems to be able to describe how this works.
Ta
What causes the valve to open?
How is it activated? Mechanically, electrically, via vacuum?
What might stop it working properly?
I am trying to debug a build up of pressure in my fuel tank but nobody seems to be able to describe how this works.
Ta
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