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Re: How do I stop pressure building up in my fuel tank?
I'm a bit unsure when in colder weather, pressure is increasing. Normally as fuel is used, and if there is some form of blocked overflow or obstruction on the filler cap, then pressure reduces as a partial vacuum is created. (this would still account for the noise)
It sounds like the overflow is blocked, and could do with some attention.
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2005 FIAT Ducato 2.8JTD LWB Gran Volume, 2000 Kawasaki ZZR 1100 D7 'fullpower' in black + full GIVI & KAPPA luggage, 2007 MB R-Class 320 CDi Sport LWB uprated by Brabus to 300Bhp don't know if there's a 155mph limiter - will be fun finding out! 2004 Mercedes Vaneo 1.7 CDi Ambiente 7-seater