On the assumption, then, that this is a new, un-smoked pipe, with no bowl coating or stain, and it tasted sour the first time it was smoked, what I come up with is the memory of having read an interview with some well-known pipe maker whose name I don't recall now, years ago.
Asked if he could tell which of his pipes would be especially good-tasting while he was making them, he said he could : pipes he made from briar that "smelled like bread" while he was making them always got rave reviews from those who bought them.
On the other hand, experience had taught him that pipes made from briar that had an unpleasant aroma while being shaped would draw complaints. He'd developed a treatment process that brought these up to "unobjectionable," but they'd never be numbered among his famously good-tasting ones.
On the assumption he knew what he was talking about, this would seem to be a matter of the briar used having been improperly cured. If so, now what ?
Assuming you like the pipe, I'd send it to LL here (Precision Pipe Restoration and Repair) or Dave Walker (Walker Briar Works) for a "de-tox." Both have methods that work. It won't involve that much expense, but both have long queues of pipes awaiting their attention, so the turnaround time would be in months.
With no claim of infallability, this is the opinion (since you asked) of
:face: