Fuel tank vacuum

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Jul 20, 2015 | 11:58 PM

fastegg

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From: Australia

Fuel tank vacuum

When I take my fuel filler cap off to fill it up, there is always a really 'powerful' vacuum. Alot of air rushes in when releasing the cap. Is this normal or should I be looking for a blocked breather ?..
The car runs fine.....

Jul 21, 2015 | 12:54 AM

GH5T

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From: Maryland

Mine does the same thing so does the wife's Odyssey.

Jul 21, 2015 | 12:08 PM

alien1974

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From: Cardiff, South Wales, UK

and mine too

Jul 21, 2015 | 02:23 PM

timmy0tool

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From: 714/949, SoCal

this is normal, for all cars, as the fuel pressure changes depending on temperature.

Jul 27, 2015 | 05:17 AM

fastegg

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From: Australia

Fuel tank breather

Quote:

Originally Posted by timmy0tool

this is normal, for all cars, as the fuel pressure changes depending on temperature.

So... does this mean there is no breather ?... Um... there must be a breather ?.... Although why is there a strong vacuum ?

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