Optimax - Air Bubbles on Fuel Side

Good Morning,

Chasing down a rough idle issue and am getting air bubbles from the top of the port rail, fuel side when running. Also tested with shop air on the air side not running, bubbles coming out of fuel side when schraeder is depressed. With shop air pressure and the engine off, I also get a slow pressure climb on the fuel side. I get minimal moisture out of the air side when running, but doesn't smell like fuel.

Inspected the tracker valve prior and didn't find any breaches, but everything Ive read points to a failed tracker as the issue. Anywhere else I should be looking?

Thanks,

JW