Wildguzzi.com
General Category => General Discussion => Topic started by: YellowDuck on June 28, 2025, 07:49:52 PM
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2023 V7 850, so E5. The EVAP system purge valve has to stay connected to the ECU, or else it will throw a code. Okay, fine. So, I disconnected the hose from the purge valve, the one that goes to the intake manifold, and plugged it, leaving the purge valve venting to air. This has had the hoped-for benefit in terms of throttle response.
My question is about the "ventilation valve", the little green and white plastic doohickey in the tank vent line, between the tank and the charcoal canister. I see this referred to by some folks as a "tip over valve", but I don't think that's right. I think its function is to close the tank vent line when the purge valve is open, so that the manifold vacuum is drawing ambient air through the canister, rather than creating suction in the tank.
I see people suggesting removing, gutting, or drilling through this little ventilation valve when removing the evap system, but I am trying to get my head around why that would matter. It is normally open. I think it only closes when the purge valve activates, but if the purge valve is disconnected from the manifold vacuum (as we do when we eliminate the evap), then it should be open all of the time anyway.
Just wondering if anyone here understands the system well enough to confirm or deny what I am saying.
I do intend to remove the canister eventually, because with the purge valve disconnected from vacuum, I assume it will eventually get saturated.