Very real possibility. That sort of goof occurs mostly from folks who remember changing a fuel filter being a Saturday afternoon pleasure taken while marveling at the complexities of a carburetor. Banjo bolts and nylon lines were not involved.

If a pro did this, I would not be surprised. I just saw a video where one recommended clamping this same nylon fuel line completely shut in order to isolate the cause of leaking residual pressure in a fuel rail. One of the reasons some of us want to do our own work, instead of paying someone else, we know how it is done, even if it is wrong.


--
Art Benstein near Baltimore

Why does someone believe you when you say there are four billion stars, but check when you say the paint is wet?