Perhaps I can shed a light on this subject. The fuel system is principally a balance between orifice size and pressure.

The engine-driven fuel pump has aneroid which puts upper deck air pressure to regulate a needle valve. If pressure / flow adjustments on this needle valve are made without a fuel pump on, to add engine-driven fuel pump pressure will increase flow. (Hi Side)

 

Charlie,

 

Thank you for the great information about the TCM fuel system and dispelling some of the OWT on the LML. Adding 3-5 gph in cruise flight will not cause the engine to quit. If it does then the engine fuel system was probably not set up correctly in the first place.

 

Regards,

 

Jeff Edwards

LIVP