[RESOLVED] Unknown vacuum ports behind the intake

[LASER4G63T]

OK, so right under/behind my intake manifold there are 4 'nipples' for hoses. only two of them had anything on them. Shouldn't the other two have hoses on them as well? does anybody know what these are? I've had a wandering idle for a long time and i cant figure it out.

 

[Auto RS T]

The two hoses are for the Purge Control Solenoid Valve for emissions. One should be solid black and the other should have small red dashes along the line. This valve is on the firewall above the brake booster.

The red dashed line on the opposite side of the intake Tee's off between the left nipple on the Throttle Body (A2 port) and the Purge Conrtrol Valve.

The Black line Tee's off between the far right TB port (P port) and the other end of the Purge Control Valve.

If these lines aren't hooked up to the TB and they are capped off look elsewhere for your hunting idle issue.

The other two lines would be used on a California ECU car only, for EGR Control.


I dug up this guide, it should help you figure out what you need to do, or steer you in the right direction.

http://www.dsmtuners.com/forums/art...-speed-shop-vacuum-diagram-removal-1g-2g.html