Vauxhall Corsa C - Fuel tank not venting

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Thu 25 Jan 2018 13:13
Vauxhall Corsa C - Fuel tank not venting - 547HEW

Son's girlfriend has a 55 plate Corsa 1.3 cdti. It sometimes loses power, more so when cold, uphill, or into strong wind!

The other day I had to put some fuel in, and noticed a big rush of air into the tank as I removed the filler cap. Wasnt too concerned about this as we had 2 Fiesta petrol cars which did this. But clearly embossed on the cap (I'm sure its OE), is VENTILATED!

My next step is to try to perform a vacuum test on the filler cap using a Mity-vac.

But wondered if it has a tank vent valve that is not working, and that the wording on the cap is referring to the system, not the cap?

We have no DTC's, but I dont really trust my cheapo reader

Any comments welcome

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Thu 25 Jan 2018 14:47
Vauxhall Corsa C - Fuel tank not venting - bathtub tom

Did it still suffer the loss of power after the filler cap was removed?

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Fri 26 Jan 2018 18:11
Vauxhall Corsa C - Fuel tank not venting - 547HEW

Did it still suffer the loss of power after the filler cap was removed?

Thanks but no, as still awaiting MoT pass following being sorned. I will post once I have concluded my investigation.

Edited by 547HEW on 26/01/2018 at 18:13

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Sat 27 Jan 2018 10:21
Vauxhall Corsa C - Fuel tank not venting - hardway

Modern cars aren't meant to vent.

they use a carbon canister to "store" fumes that is then vented into the engine when conditions are correct.

The cap is only meant to work one way permitting air in,

not out.

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