Dragging air?

[philpemberton94]

Was just on my way to work and the my d turbo started having what i can only describe as little surges in acceleration, felt like kangaroo juice, only slightly but enough for me notice, i am wondering, as it was very low on fuel could it have been dragging air through the fuel? It did the same thing the other day but stalled, i then noticed air bubbles in the line between the fuel filter and pump, wondering if this is the cause?