hi,

i've got large air bubbles in my primary filter when i rev the engine; i've tried using a seperate container with diesel fuel and run straight off that and i still have bubbles in my filter. i used a different filter too and a different hose with same result. have rough idle (because of air leak i assume). not really sure where to go from here. could it be that the lift pump is somehow creating these bubbles? thanks for any advice