Quote:
Originally Posted by JDMsurprise
The occurrence of a backfire after filling with gas points to an open purge solenoid that allowed gas to enter your intake. The backfire could have damaged your intake or its gaskets, leading to vacuum leaks. Sorry, I am not familiar with the evap systems in Boxsters, this is just general automotive advice. I would smoke test the intake.
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I do have an occasional howling by the fuel tank, which to my understanding is where that solenoid would be located. i’ll see if i can get my hands on a smoker for the intake. maybe it failed all together and there’s some kind of vapor lock?
i know this is a completely different animal but i’ve had it happen on my old vws