Vacuum pipe connection

[m3gadeth]

Not long had my 2000 A4 1.8T Sport Avant and had the engine management light come on several times, sorted a misfire by replacing 2 coils packs, but the code 17536 for it running lean appears every couple of days. Searches show to check the vac pipes under the inlet etc, today I moved the expansion tank to got to the oil filter to change it and I noticed there is a unit under the manifold, there are 2 actually and both have electrical connections, the rear one is a green socket and there is a pipe connection but no pipe is connected, the one further forward has a braided pipe which runs around the front of the block. Does the one without a pipe actually need to have one and if it does, where to? Thanks

[Crasher]

What is your engine code, APU? That fault is normally the one way valve under the inlet manifold on the crankcase ventilation system, part number 035 103 245 A or a split in a crankcase ventilation hose.

[m3gadeth]

Engine code is ATW.

[Crasher]

No, AWT, same valve and problem anyway and it would make it a 2001 model.

[m3gadeth]

Duh, got my letters the wrong way round! Car was regd 01/09/00 so just on an X plate. Thanks, I'll have a look tomorrow.

[Crasher]

The chassis number must start WAUZZZ8DZ1A?????? then?

[m3gadeth]

That is correct.

[m3gadeth]

So back to the question, anyone know if there should be a hose connected to the pipe? Also, where is this PCV, i cant see it for looking!

[Crasher]

Can you post a good picture of the pipe?

[m3gadeth]

06092011122.jpgHope this helps, had to undo the expansion tank to see it.