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Fuel tank

Posted: Sun Nov 02, 2008 5:25 pm
by jono_785
Hi guys i know we have been over this abit before... but my fuel tank will not breath air in... so as fuel is used tank sucks in. tank can breath out no prob, tank never builds positive pressure. so i guess my question is how does air get into a 1990 sierra fuel tank???

Posted: Sun Nov 02, 2008 5:33 pm
by want33s
Air gets in through the vented fuel cap.

Jas.

Posted: Sun Nov 02, 2008 5:34 pm
by jono_785
thanks jas.