Carbon Canister Problem

[NICKS33]

ok on the top of the canister theres 2 vaccume/ pressuse pipes...one small and one large...the large one goes on the back of a little valve on the top and the small one goes on the other side of this....well some how ive lost the lid of this little valve hence both these pipes do nothing....just wondering should i block these off while i look for a new peice??

also will this afect my fuel consumption and the air/fuel ratios??

[skylinecouple]

I believe the cannister absorbes fuel vapour from the petrol tank then allowing it to be drawn into the engine under accelleration.Should these hoses remain unblocked I would assume you have effectively introduced an air leak.At best,extra fuel vapour pressure when you open your tank.At worst,uneven idle and another way of letting dirt into the system.

[NICKS33]

hmm thats what i thought it did...just checking there wasnt serious engine harmful effects...well idle is stable hasnt changed...might just block these 2 hoses to stop the presure in the manifold leaking out while i get another...

[nF]

when i removed mine i just blocked up everything

though apparently you are supposed to leave the fuel tank vent one open, but i didn't want it venting into the engine bay