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When your fuel tank is low in your 1993 Lumina is it pressure or vacuum you hear when you open the cap?

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βˆ™ 2006-09-22 00:29:22

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it is vacuum,caused by the cars emission system

2006-09-22 00:29:22
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Q: When your fuel tank is low in your 1993 Lumina is it pressure or vacuum you hear when you open the cap?
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