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Old 09-09-2015, 11:46 AM   #1
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Lightbulb Vented vs Non-Vented

Got the CEL on my 03 and the readout was emissions evap. Gas cap looked like the rubber ring was showing its age. I replaced it with one from autozone, and noticed that when I unscrew, it makes a hissing sound, like its sucking for air. A few days went by, and it threw the same CEL. Do I need a vented gas cap?

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Old 09-09-2015, 12:09 PM   #2
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Get a Porsche gas cap They are around $20
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
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Instructor - San Diego region, 2014 Porsche Performance Driving School
2013 C300, 2010 Jetta 2011 Mazda 3, 1998 Windstar - Dog van , 2004 F-150 "Big Red"
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Old 09-09-2015, 01:31 PM   #3
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Seconded. I had a replacement cap on my car when I bought it. The Porsche cap from pelican was 14 bucks with a new strap. No Brainer.

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