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Old 05-28-2010, 01:16 PM   #4
3100
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Re: does anyone still hear hissing sound when gas cap is removed?

Quote:
Originally Posted by ricebike View Post
yes i still hear the sound when i take off the gas cap to fill up... it's supposed to be almost closed system, so we won't vent fuel vapors to the atmosphere...

why there's soo many vehicles with obd II systems that light up the check engine light when the cap isn't properly tightened

What year and engine size is your GA, also how many miles and what is your average mpg?
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