Ended up getn it to boost... Disconnected battery... Cleaned maf sensor.. Triple checked all hoses and conections... Started bus.. Opened the needle to the actuator arm fell away frm grub screw then adjusted to it went back up n touched the grub screw... Dawes valve is wound right in til there's no more thread... I'm seeing arnd 18psi nw... The 4 inch is sucking in some serious air... And when I turn off the rig it sounds almost like someone's flushing a toilet.. Lol.. Is this normal?