G'day
Todd W. White, to PackardInfo.
As mentioned by others it could be a non venting fuel cap. See
this THREAD which details a similar experience.
Meanwhile, as you're sorting out the problem, I invite you to include your '49 Deluxe Eight Touring Sedan in PackardInfo's
Packard Vehicle Registry. Quote:
53 Cavalier wrote........BTW, most of us are kind, you'll quickly figure out who the unkind ones are, so I won't list their names!
I hope I'm one of the "kind" ones and not on the naughty list.
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