The system and injection pump is fed fuel under pressure by an electric lift pump. So no it would not be sucking air. The lift pump also must maintain a specific pressure to the injection pump because the fuel is also used to cool the pump and its electronics. Low fuel pressure is the main cause of pump failure on vp44 pumps.

Last edited by yella71; 02/01/19 10:55 AM.
71 challenger convertable, 64 sport fury 383 ci with factory air 99 sebring convertable 89 CTD pup