<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by Scott.T:
<B>So it won't effect the overal running of the car then if it or it's connection is faulty ?
Does the air from the 2 connecting pipes just go to the canister behind the headlight then ?[/quote]
Hi Scott,
The Purge valve is used to control the flow of fuel vapours from the purge cannister (sometimes referred to as the charcoal cannister). Fuel vapours from the petrol tank are stored in the purge cannister and then the purge valve controls the flow of them into the intake system. These fumes/vapours are then combusted with the fuel injected from the injectors.
The fuel tank is then "purged" of its vapour.
The idea is that this will reduce the evaporative emissions from your fuel tank. Older cars without a purge system have a small hole in the filler cap to constantly vent the tank.
Generally speaking an engine will run perfectly well without the purge connected. The pipework to the purge cannister has a blow-off valve should the tank pressure get to excessive levels.
However, if you have a MY00 or later the ECU will have On-Board-Diagnostics (OBD) that will detect a faulty (or disconnected) purge valve and will illuminate the check engine light on your dash.
Hope the info helps
Paul