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Evap Purge Valve - what is it and any problems if its bad?

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Old 04-18-2001, 10:57 AM
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Default Evap Purge Valve - what is it and any problems if its bad?

Seems it has gone bad on my S4. Dealer said the car is still drivable and the part is on order.
Old 04-18-2001, 11:03 AM
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rao
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Default It is part of the fuel vapor recovery system - so that fuel vapor can be recovered and used

instead of being vented to the atmosphere - it shouldn't effect performance, but it wil cuase a non-flashing check engine light
Old 04-18-2001, 11:05 AM
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Default Dealer said the 'swooshing' sound was because of the valve...

Seems weird for a fuel valve to cause a swoosh when accelerating.
Old 04-18-2001, 11:13 AM
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rao
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Default Here is the system

<center><img src="http://pictureposter.audiworld.com/5445/getimage.2.jpg"></center><p>1 - EVAP canister
2 - EVAP canister purge regulator valve
3 - check valve
Old 04-18-2001, 11:15 AM
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Default Thanks for the diagram...

Makes more sense now.
Thanks for the help.
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