914 won't go above 3500 RPM

Blowing air into that port will not necessarily show your problem because the pressurized air can escape thru the circuits internally.

Pull the float bowls and place them on a flat surface and make sure they are flat. I bet they both aren't

It makes a lot of sense, though I did use a calibrated torque wrench to tighten each bowl to 48 in-lb per manual. I fit the seals and torqued on the bench so I was able to make sure the seal was seated properly and I have no fuel leaks on the bowls...could there be a leak somewhere else that would cause this? I'm going to pull all the manifold lines off and check them again

Blowing air into that port will not necessarily show your problem because the pressurized air can escape thru the circuits internally.

Pull the float bowls and place them on a flat surface and make sure they are flat. I bet they both aren't

Blowing air into that port will not necessarily show your problem because the pressurized air can escape thru the circuits internally.

Pull the float bowls and place them on a flat surface and make sure they are flat. I bet they both aren't

Per Lockwood

Float bowl torque

35 in lb paper gasket

40 in lb rubber gasket