Paccar fuel filter doesn't stay full

[aaronb]

I know you weren't replying to me. I just wanted to say that I didn't mean to imply in my post that the different micron rating fixed the issue. I was just noting that it was running higher. I'm going to get the diagnostic hose and another 10 micron cartridge. I'll try and remove all the air and see if it comes back. I don't know if it will help any. I know it can't hurt though.