Answer (1 of 11): At least one poster warned of engine damage… pretty sure that isn’t a real concern. That said, the gas cap is an integral part of the emissions equipment, absolutely on anything post-1996/OBD-II. How long/far you can go before the check engine light comes on depends on the make
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I pumped gas into my car today, and I forgot to close the cap. I drove all the way home, and it was raining really bad outside. On my way home, there
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What Happens When You Fill Up With Too Much Gas?
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