Air bubbles in fuel line

[Petekaye]

My ‘86 wagon has been running great for a few months now, but all of a sudden it started stumbling badly on a 70 mile trip. Barely made it back. I replaced the fuel filter and put the rebuilt carb that I’ve been meaning to install on it. Ran great for a couple days then stumbled badly again. I hooked up an electric pump to hose going to the fuel filter just to have a look and there are a whole lot of tiny air bubbles coming from fuel line. Any suggestions? All the rubber hoses in the fuel system are new, fuel tank, filter, fuel pump, carb - all new.

[dlb]

My car generally runs well but I noticed bubbles at the fuel filter too, and asked here on the forum about it. Here is that thread:

viewtopic.php?t=16159

Basically, it seems like the bubbles are not due to sucking air in the system. It might be due to agitation of the fuel as it passes through the fuel filter? I don't know.