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View Full Version : throttle body/vacuum line route

devonkyle77
07-26-2008, 09:23 PM
my question is where do the two vacuum lines (you can see the 2 hardlines in the bottom center of the TB) route to? if its relevant this is for an s14 sr. thanks!

http://i84.photobucket.com/albums/k4/devonkyle77/36783657.jpg
GabeS14
07-26-2008, 09:27 PM
both of mine are sealed off!
one is charcoal canister evap line, and the other I forgot I think is just for vac.
devonkyle77
07-26-2008, 09:48 PM
what did you seal them off with? the one that is "just for vac", can you be specific about where it goes? thanks man
Bigsyke
07-26-2008, 09:56 PM
The one just for vac goes to your intake pipe
flip3d
07-26-2008, 09:59 PM
autozone has little rubber caps. those work perfect.
devonkyle77
07-26-2008, 10:04 PM
which one is it that is just for vac, the one on the right or the left in the pic?
flip3d
07-26-2008, 10:16 PM
which one is it that is just for vac, the one on the right or the left in the pic?

d00d, they do the same thing. pick one.
GabeS14
07-27-2008, 05:33 AM
I am pretty sure the one on the rigth is just vac, and left is the charcoal, canister thingy..lol.. get the caps that the previous guy posted about, thats what I have on both.
bo2o
07-27-2008, 06:59 AM
juss loop a hose to each other. no need for cap haha.
cheap ftw.
Bigsyke
07-27-2008, 10:31 AM
What ive found about capping the lines to the evac was......Durring decel, the lack of fuel vapors creates a super lean condition. Its also constantly purging, and I would assume fuel vapors taking the place of air would Decrease detonation? correct me if im wrong, but after my evap removal, things have been running a little rough from capping the lines.
devonkyle77
07-27-2008, 01:45 PM
glad you posted bigsyke. if anyone could shed some light on this it would be appreciated.
GabeS14
07-27-2008, 10:58 PM
I thought not having the evap, only caused the rpms to drop a bit too low when getting off the gas. is that what you feel?
Bigsyke
07-28-2008, 12:03 AM
well there has been some hickups @ idle...but mostly on decel I can hear the exhaust backfiring due to a lean condition. Yes the evap is ugly as hell, but Im going to replace all the hoses, hook it back up with new hardlines and see if any misfiring will cease. If anybody can shed some info about a lean condition durring decel please Let us know. Need to know if it will cause detonation or any harm.,...if not then horray!
GabeS14
07-28-2008, 12:30 AM
well there has been some hickups @ idle...but mostly on decel I can hear the exhaust backfiring due to a lean condition. Yes the evap is ugly as hell, but Im going to replace all the hoses, hook it back up with new hardlines and see if any misfiring will cease. If anybody can shed some info about a lean condition durring decel please Let us know. Need to know if it will cause detonation or any harm.,...if not then horray!

I also have the back fires(loud) during downshift and deccel.
but I thought that was cuz I am running rich??(850cc inj)