Air from fuel cap

1996 OPEL VITA
50,000,000 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC
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MRZAZA
  • MEMBER
  • 27 POSTS
Why when I remove the fuel cap air comes out and sometimes sounded loud?
Thanks
Dec 4, 2018 at 5:22 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi and thanks for using 2CarPros.

It is normal for the fuel tank to have pressure. However, excessive is not. The system should have a vent to the evaporative emissions system as well as a fuel tank pressure sensor which will vent the system as needed.

Let me know if you have other questions.
Dec 4, 2018 at 5:06 PM
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