The system is fed vacuum from one of the two inner hose barbs on the back of the breather bridge. There's a solenoid valve on the back of the driver's side cylinder head actuated by the engine ECU.
When open, the solenoid draws fumes from the charcoal canister behind the driver's side wheel arch liner. This, in turn, collects vapours from a breather in the top of the fuel tank. The engine draws the vapours in and burns them rather than them venting to atmosphere.
The ECU periodically purges the charcoal canister when engine conditions are right to do so (light load, so plenty of vacuum, and in closed-loop mode so it can compensate for any extra fuel / air drawn in).
I doubt you need an evap. emission control system for IVA, do you? I just have an open breather on the Westfield's tank, with an anti-spill valve on it.
If using the original ECU, you'll need to have the solenoid, or a resistance to simulate it,connected to the ECU or it'll raise a fault code, You can safely block off the vacuum line if not fitting the rest of the system.
Looking forward to seeing this in the flesh.
Kevin
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Topic: Fuel tank vent! (Read 1868 times)