Hope this link works:

What are these two for? The little one has vacuum and the larger one does not seem to have a vacuum effect. The only thing I can think of is evap, but the hose sizes are alot different.
This is a JDM B18C, Does the Japanese motor even come with evap or not? I was reading on here that the Japanese motor doesn't use evap. But I am not sure, because why do I have these nipples? And I will be using P72 obd2a Japanese ecu, with obd2b to obd2a jumper harness. If I am not using my evap canister, what is the best way to 'disable' it, as in just plpug the hose coming off the canister? Or must it be breathable?
And please don't just post a 'gsr im diagram' I've seen the same one again and again on this site. Thanks!!!!

 

if it helps you much... the gsr intake mani consist of 3 pieces.

the piece in which you have circled in red(lil vac one)... is infact for the evap purge solinoid(on obd1 setups). on the obd1 gsr intake mani... the top portion of the has a little hole on the side of it to screw in the unit.
*heres a picture to help you


on obd2 gsr intake mani... the unit mounts on top of the mani itself.
*heres a picture to help you


here, i included another picture to help you out.


these are what you and i are talking about


simply put, you have a gsr mani which consit of the obd2 top portion, then the butterflies, then an obd1 lower portion.

the other thing in red in which you circled seems to be another air passage for the evap system. however, this air passage tube is suppose to be straight, and not bent like a coolant passage tube as shown.


Modified by gsrious at 1:21 PM 11/22/2007


Modified by gsrious at 1:22 PM 11/22/2007

 

Thank you so much for the diagram for obd2 intake manifold! I have only seen the obd1 one on this forum again and again.
That makes more sence to me now, but the only thing is there are no holes anywhere, on the top or on the side to mount a evap sol. And being a JDM motor, did they even use evap in japan or no? I read that they don't, but maybe they started using it for obd2 motors? Do you think I will throw codes if I just block these off? Or should I use a evap sol?
And howcome you say I have obd1 lower, and obd2 upper?
Thanks for your help soo much!!!!!

 

hmm... since there are no holes that have threads in them, then maybe the jdm motors never came with any evap system(sorry, im not too knowlegable on that part).

anyhow, dont let that stop you from putting the evap system in. those places, as i describes, are solely for the purpose of mounting them. you can go ahead and mount them where ever you want. you can even zip tie them if you like.

to answer your question, it should not through a check engine light. however, if you are running on an obd2 system, it just may through a light on you. dont sweat it though.

 

gsrious, man thanks for that diagram also helps me out alot finding a couple issues i am having as well. for you