if i remove the check valve at the tank, the charcoal canister, can i also remove the electronic silenoids in the engine bay? basically a feed/return line with an atmosphere vent next to the filler? or do i need any of this?

 

let me see if i can ask in a different way. ok, so how does the fuel system behave with the electric silenoids removed. they have a few vac. lines running from the intake and evap canister, the red ones. can i remove everything and just have a feed return line with a breather by the filler neck? or will this **** off the ecu/ruin fuel delivery/pressure?