Are you talking about the vapour return cannister? These can't be disassembled. I have no idea what their seviceable life is or how to know if it is still working. And I would be surprised if you could get a new replacement unit. I swapped the metal cased single inlet cannister on my truck to a plastic one from a wrecked Cordia turbo (it has a provision for A/C but I am not sure how that is hooked up yet). I have noticed some Mitsubishis have a problem with fuel tanks self pressurising when temperatures are high (some cars I have seen vapour lock and won't pick up fuel until the tank cap is cracked open!) The pool looks like it's too far forward of the cannister to be the source but stranger things happen.