Vac Lines Help, Fuel Help

Hey guys,

I finished putting my 5k engine into my KE30. I've used the 5k Carby its bigger then the 3k. problem is there is a whole heap of vac lines off the 5k carby compared to the 3k.

Now i've blocked off most of them except 1 that is making me scratch my head.

The lines runs off the passenger strut tower side of the carby and according to the haynes manual could be a "TP line" This line is sucking air like crazy. you can hear it suck when its disconnected.

However if i block it the car runs worse they idle spatters etc. With the line off the car seems to run ok.

Id still like to know where i am supposed to plumb this line??

Any ideas?

Second. My fuel tank seems to be pressurising and pushing fuel through the fuel filter when the car is not on. It is filling up the carby bowl. Once i open the fuel cap the pressure disperses and it stops flowing. I never had this issue with the 3k. Is there something that maybe i don't have connected... like a VAC hose somewhere?

Any hints would be great.

Thanks

Grant