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I was getting a “blowing over a coke bottle” sound from my 2000 Boxster S. I changed the fuel filler vent valve and gas cap but the sound is still there. Squeezing a blue “check valve” makes it go away. Thoughts on how to fix?

  • 2000
  • Boxster S
Mileage: 
49 800
Fuel System
Springboro, 
Ohio

I was getting a "blowing over soda bottle" sound from my Boxster S.  I changed the fuel filler vent valve and gas cap but the sound is still there.  I noticed that when I squeeze what looks like a blue "check valve" on the line the noise stops.  I don't know how to change the check valve or why that would cause the sound.  Anyone else have this problem?  Thoughts and suggestions?

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