Anyone have a picture or diagram of the hose orientation on the idle up valve?

Joined
Apr 16, 2019
Messages
1,767
Location
Colorado
Visit site
I replaced my idle-up vac hoses about a month ago and feel weird about the orientation of my hoses. I pulled them both while replacing and am now wondering if someone with a stock cruiser would mind taking a picture of their idle up hoses and the orientation the plug into the valve. I haven't put many miles on the cruiser since I installed them - while checking fluid levels today I glanced at the hoses and it got me thinking.

One line connects to the top of the intake manifold and the other connects to the air box.
 

Eicca

Professional Noob
Joined
Apr 26, 2009
Messages
2,371
Location
Utah
Visit site
IIRC it doesn't matter, since all that the valve does is allow air to pass through when enough load is placed on the power steering pump. No matter which way the hoses are strung, it'll operate the same.
 
Joined
Apr 16, 2019
Messages
1,767
Location
Colorado
Visit site
IIRC it doesn't matter, since all that the valve does is allow air to pass through when enough load is placed on the power steering pump. No matter which way the hoses are strung, it'll operate the same.

Thanks for the input. So to say that back to you the way I'm hearing it: when a great enough load is placed on the power steering pump to reduce revs, the idle-up opens a non-directional valve and introduces un-metered air to the intake manifold to increase revs.

In looking at the idle up diagram, I don't see where its input to perform the open/close function comes from? It would seem the most logical way to do this would be via vacuum. This is why I was leaning towards the valve being directional. In essence, intake manifold vacuum increases as power steering load climbs, idle up opens from that vacuum and pulls un-metered air from filter box.
 

Eicca

Professional Noob
Joined
Apr 26, 2009
Messages
2,371
Location
Utah
Visit site
It opens via pressure from the power steering pump. Somehow. But other than that, correct. Technically the air through the valve is metered because it's after the MAF sensor.
 
Joined
May 26, 2008
Messages
414
Location
Leduc County
Visit site
not sure if this helps. my original hose orientation after removing the air box...

IMG_6515.jpeg


IMG_6516.jpeg
 

Users who are viewing this thread

Top Bottom