petrol tank venting ecu control

[rr]

Sounds like you either need, or need to replace the pressure vent valve.
On GM cars, they have a valve that is connected to a hose that goes to
the top of the tank. This valve will both release pressure or vacum as
needed. This occurs within only a few psi differential of ambient. The
valve is nothing fancy, just a plastic piece that sits close to the tank
under the car, kinda' mushroom shaped.

BobR.

Dave Evans wrote:

> Hi all
>
> Could anyone point me in the direction of some info on petrol tank
> venting? Particularly how/why use a carbon canister.
>
> I'm about to fit the second fuel tank in 4 months because of it being
> sucked in, and splitting! I am unable to grasp what is going on with the
> venting and control of the carbon canister and why it's connected back
> at the inlet manifold end?
>
> I have confirmed that the valve in/on the canister operated via tech1,
> at what point would the ECU fire the valve? the car uses the ECU from
> the ZR1 so I guess its a P4(331)
>
> Any help would be much appreciated.
>
> Dave Evans
> Lotus Omega 3.6L 24v, striaght 6, dual Turbo 412BHP
>

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