Air in DAVCO

[Evotrucker]

I have this same issue with mine, small air bubbles like champagne bubbles are fine... tho in my opinion yours are champagne size but some come out bigger then others.

When i changed the oil and filters on my truck recently, i replaced the plastic housing cuz the old one had a yellow hue to it so it made it difficult to see threw it lol. after reading online for a while i think its the air bubbles that get sucked in and out of the tanks that's causing mine to have bubbles like your's.

I found a system that treats that issue with air in the fuel lines, airdog or something along the lines. It's supposed to help the lifespan of the injectors by taking out the air bubbles or air period in the fuel lines and system, the price i saw was $600 or a lil more but anyways, i hope its just air bubbles and nothing else.