Throttle body vacuum lines

[Kingdom]

OKay. I am having a very hard time getting my idle right.

I changed 2 ISC motors and still cant idle right, and I dont have a scan tool to let the stepper motor stop half way to adjust the BISS screw.

so I decided to use the JDM throttle body that came with the 6-bolt motor. the thing is that the JDM throttle body only has one vacuum nipple instead of four, and I am using two that go to EGR solenoid with the other two plugged off.

What I dont know, is that on the old throttle body does it matter what vacuum nipple u actually used for which line. I mean if I had a stock car and I switched around the vacuum lines on the throttle body will it make a difference? are some restricted more than the others etc?

I just want to know if I can have a T for those two lines that I am using to go to that single nipple on the JDM throttle body?

 

[Defiant]

The differences in throttle body ports is whether they're "ported" or not, meaning whether the throttle butterfly's edge closes over the port and shuts it off at idle. See if this helps any; the 2G page is emissions1.htm:

http://www.taboospeedshop.com/emissions.htm

 

[Kingdom]

alright I understand now. I had a look at the throttle body and blew threw the ports, all four. two are just boost sources (A & A1) then the other two, E is a tiny whole before the butter fly and the P is after the butterfly.

so I guess I cant use the T as I thought. probably just gonna cancel the whole godamn EGR and live with the CEL.

Thanks anyways, learned something today.

 

[whitegst97]

I need some info on the 90 TB, which one of the ports are vaccum, pressure or vaccum and pressure? The ports are old and they aren't solid, what i mean is that if i move it the rotate could this cause a leakage or something. Thanks