Unphzd

ive been researching about this for the longest time and i guess theres no info on it online hopefully somehere knows.

i have 2 nipples in the back of my 1997 jdm d15b w/ vtec stock intake manifold and i do not know where they attach to anyon have ideas?

IA95civicDX

i believe they run to some little canister that sits along the firewall idk exactly wat it does but i kno you can cap them and the car will run just fine.

Unphzd

i can just cap both of them? when i cap them my car wants to die... haha right now one is connected to the egr which is making it run crappy and one is capped when i take out the egr one it sounds like it runs better. cuz its sucking in air. is capping it with a vac line + screw fine then?

IA95civicDX

Im pretty sure i looped mine from one port to the other when i had a d15b which would be the same as capping each one and i had no problems. sorry im not more help thats been five years ago lol. Yes a bolt will work in line, or loop them or get the fancy vacuum caps at napa lol

Unphzd

hmmm.. haha do you remember anything from installing your d15b? hahah could i like ask you a couple of questions? haha cuz my car is running rich right now with one capped and one connected to the egr. i need to rewire vtec cuz it was wired wrong, would wiring vtec wrong cause it to run crappy? it wont let me rev past 3.5rpms.

IA95civicDX

yes it will cause it to run wrong if you ran it wrong you could even be getting power to vtec solenoid when you dont want to be. 2 wires run from solenoid to the ecu and one ground i cant remember pin placement in ecu but there is a thread on how to wire it on this site.

Unphzd

Yeah ive been wondering about the ground wire.. i only have 2 wires running not 3.. 1 to A8 and other to A21 but noo ground wire..? and theres not vtec pressure switch right? cuz mine is not there the green cap thing.

foo fighters

the "green cap thing" needs to be there! you can fix your VAC. problem by adding a vacuum block. the d15b I.M. is exactly the same as a d15b7 I.M. with only one vacuum nipple missing and a throttle body vacuum nipple missing,a vacuum block can fix this. i'm not sure about the similarity between the d15b7 I.M. and the d16y8 I.M. my d15b manifold doesn't have those, i have a white AMP sensor there. it's not a d15z1 is it???