Engine noob. Disconnected pipe.

[jjhwk__]

I was poking around my engine today whilst checking on oil levels and topping up washer fluid when I noticed a pipe with nothing connected too it (shown above) the pipe with nothing on it comes out of the air box. After a bit more digging I found the black pipe next to it was meant to be connected too it. So I hooked it back up and started the engine only for it to idle very lumpy at lower than usual revs.

I have to apologise for being a relative car noob, and don't know the ins and outs of engines so any advice as to what's going on here would be much appreciated!

Car is a 2006 1.6 petrol.

 

[nluk100]

Where does the other end of the flexi pipe go to?

 

[jjhwk__]

Where does the other end of the flexi pipe go to?

It disappears under the bottom left of the engine cover so I'll take that off and have a look tomorrow when it's bright out.

 

[paddy]

A quick look on google shows that flexi pipe going into an elbow and into the filter housing.

 

[nluk100]

Yeah, it's the other end I was asking about. It's obviously not vacuum at that point. It could be a water drain or something, so curious why it causes tickover issues.

 

[paddy]

Its a bit like taking the oil filler cap off, you get tickover issues because its all part of a closed circuit breather system i expect, if it can draw air in there , no point in having a filter further down the line. I expect the flexi pipe goes to some sort of breather box

 

[traindweller]

Its a bit like taking the oil filler cap off, you get tickover issues because its all part of a closed circuit breather system i expect, if it can draw air in there , no point in having a filter further down the line. I expect the flexi pipe goes to some sort of breather box

But isn't the OP asking why the tick over is better without the pipe connected?
The only thing I can think of is that the filter is blocked and not getting enough air through it, made worse once you connect that pipe back up perhaps?

 

[paddy]

Yea you are right, i misread the first post...anyway the OP seems to have got a bored as i have with the whole thing
Cant imagine a filter so blocked it wont flow air at tickover unless it got soaking wet and shrank and went hard.v

 

[jjhwk__]

Sorry haven't been able to get online the past days as we had new broadband fitted, anyway I replaced the filter and re connected the pipe, some tickover issues at first but then took it for a long drive and its much smoother now, thanks for your suggestions guys.