Yes i don't think its fuel pump either but i do need to change probably original. And yes thinking selector valve needs replacing as well just weird it does this in either or tank in use.

Tony Cook wrote on Mon, 09 March 2015 13:36

Totally hear ya on the Qjet filter i have become a pro on replacing them in like 5 min. Flat ! Lol that was the case before having tanks and lines redone but now it is most definitely starving because of the air / vapor happening before the fuel pump as i can see it happening with the clear filter i added before the fuel pump . They start off very small when viewing through the see through filter and then ends up like a wooshing sloshing session happening causing the lean issue. All I'm saying is i now can see most definitely what is happening just now trying to figure out how to remedy it ? Switching on the pusher pump does help i can see when i engage the pusher pump it preaserize's the line but doesn't seem to totally cure it.

Tony
Have you considered there may be a split in a rubber hose allowing air to be sucked in?

Dennis