N00b here hi, need help on this. i have a 97 non turbo volvo 850 gle 2.5l. i was tinkering around with the air box( okay i wanna build a CAI lol ) and realized that there was this hose sticking out of it. looks like it broke off or something. does anyone know what this is? im gonna attach pictures. im not sure if this is a problem or not cuz the car still runs

Can anyone identify the RED, BLUE, and GREEN arrows? the RED arrows the one the i think broke off




ALSO, i took a picture of my uncles 850 same non turbo model bought it the same time too. why is his airbox different? look at it, there are no hoses sticking out off it ( RED and BLUE arrow from above pic are not present in this airbox )



Side question:
What is this thing? theres a hose from the airbox sticking into it ( yellow arrow)




THANKS A BUNCH! CHEERS!

(sorry for the huge pics , thought it would add detail )


CHRIS

 

Not sure about your first two pictures, but the yellow arrow in the third picture is pointing to a cover. Under the cover you will find the IAC which is the Idle Air Control (that's what the tube with the green arrow goes to). You will also find the vac tree, and throttle body linkage.
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thanks for the reply! what does the IAC do if you dont mind me asking? volvos airbox seems to be a tad bit more complicated than the japanese ones with all those tubes sticking out off it.

 

the IAC controls your Idle so dont mess with it! also, there are lots of things that work off vacuum lines so you really dont want to mess with those small hoses too much.

 

It controls your idle and I think it's responsible for driving. If you rev the engine, you will see that wire go taught and pull back.

 

First picture is white hose runs to intake I believe forget exactly where. The one that is broke is supposed to run from there to the front lower portion of the air box to the valve where the fresh air comes in.
The big hose goes down to the air pump

3RD is the cover for the throttle cable and vaccum tree also the Idle motor.

 

ok IAC and the hose that feeds air from it ( yellow and green ) CHECK! not gonna mess with that anymore lol.

only thing left is the hose that broke off (red ) do i need it? what does it do?

CHEERS

 

Like I posted above the red hose goes from where it broke to the bottom front of the air box to the valve that feeds hot and cold air to the air box.

 

oww thats right sorry bout that tech. what does it do? is it important?

 

When the engine is cold it directs heat from around the exhaust to help the engine warm up faster.
You can lock it into the cold only position and be fine.

 

ok thanks for the info!