Hi,
I bought a used saxo about two months ago (2002, 1.1i). I got it to repair shop some time ago to change filters and oil. I'm noticing inconsistent and and low rpm on idle, so today morning i took a look under the hood and noticed disconnected tube. My questions are:
1: What is it?
2: Can it be the cause of rpm problems on idle?
3: Can i easly reconnect it? (i didn't want to fiddle to much not to break something, and not sure what it was)
4: is possible mechanic disconnected it while checking something?
Here's a picture with the tube highlighted where it was disconnected (it's connected on this picture i just took a random pic of the internet because didn't have time before work, i can take a photo of how it actually look likes in my saxo later).

thanks for help!
I bought a used saxo about two months ago (2002, 1.1i). I got it to repair shop some time ago to change filters and oil. I'm noticing inconsistent and and low rpm on idle, so today morning i took a look under the hood and noticed disconnected tube. My questions are:
1: What is it?
2: Can it be the cause of rpm problems on idle?
3: Can i easly reconnect it? (i didn't want to fiddle to much not to break something, and not sure what it was)
4: is possible mechanic disconnected it while checking something?
Here's a picture with the tube highlighted where it was disconnected (it's connected on this picture i just took a random pic of the internet because didn't have time before work, i can take a photo of how it actually look likes in my saxo later).

thanks for help!