Ok so my b16 gave out on my em1 and i swapped in a b20 since it was cheap :/ but ok heres my problem. i put on an ls manifold and idk what these two nipples go connected to. my cars idle would fluctuate. then i plugged the coolant hose, ran a U hose and basically connected the two nipples with one hose and plugged the second nipple on the back of the manifold by the clutch/ brake fluids. nnow my car idles kind of normal but still fluctuates minimally under the 1k rpms range. the throttle body is what i think would be my stock em1 TB but not 100% sure about that. any help will be greatly appreciated. no CEL's as well.

 

these are the two nipples on the TB and the plugged coolant hose right under it.

 

the plugged hose goes on the nipple to the right.

the left nipple leads to the IACV - out from IACV to the coolant tube that run along the back of the block.

 

Thank you, will take a look when i get home and update

 

What about the second nipple on the back of the intake manifold?

 

coming from the iacv or the left nipple on the TB?

from left nipple in pic - to IACV on back of manifold - out from IACV to the coolant tube running across backside of block, under the manifold.

 

no theres two nipples behind the manifold by where you put the clutch fluid. i put one vacuum hose on the outside one but theres an empty one next to it and idk what goes there

 

can you take a picture? I believe..large nipple goes to Brake booster and small nipple goes to your cruise control diaphragm (if using it)

 

not my pic, but these two. my car only has one hose coming out from the firewall area and i plugged it into the outer one. idk where the inner one goes to so i just plugged it.

 

any help

 

One of these might answer your questions

B18A1 vacuum diagrams:
http://tinypic.com/r/2nrh735/5
http://tinypic.com/r/4fu4cg/5

B16A2 vacuum diagrams:
http://tinypic.com/r/f1wcw5/5
http://tinypic.com/r/34zaq7d/5

 

but b16 doesn't have a Fuel pressure regulator control solenoid valve thing. Unless im blind?

 

ttt

 

Anyone...

 

bump