Only problem I had was a random howling sound coming from the gas filler door area, so this weekend I installed a new vent valve on my 2003 Boxster. Didn't solve the problem.
What does stop the sound is partially plugging the hole located in front of gas filler doorsee picture. I took a piece of one of my kids nerf gun bullets which is made from sponge with same OD as the hole in the filler door and a 1/8" ID hole through the middle of it. I pushed a piece of piano wire through it to hold it in place see 2nd picture. With this in place the howling completely goes away.
Since this solves the problem would you have any idea what the problem could be? Gas cap appears to be OK. Thanks
__________________
This post was auto-generated based upon a question asked on our tech article page here: