Thin Yellow Pipe Connection

2002 TF 135.I've replaced HG etc and don't remember disconnecting this pipe - (photo). I can't see an appropriate connection.The other end is connected to a chamber (photo) which in turn is connected to a small box with electrical connections (sensor?).The chamber and small box are located immediately below the offside "boot" hinge adjacent the cambelt.Help Please - What is this for and where is the unknown connector?Thanks

I'm guessing here is that the take off for the exhaust flap valve which I believe is/was fitted to earlier TF's on the N/S exhaust outlet and was vacuum operated.
I can't quite make out the part number but if you type it into google it may come up with something helpful, I bought a bunch of new spares for my TF and spent a couple of hours doing it to find out what they were for.

This link might help http://mgf.ultimatemg.com/group2/exhaust/TF_evc.htm
you don't want to leave the pipe open as air will be sucked into the manifold and muck up the mixture

Thanks for that.
I can’t find reference on UltimateMG.
The bore of the plastic pipe is only 1-2mm and the length/run suggests the connection should be to the inlet manifold.
The chamber would smooth the vacuum and a sensor would operate an electrical signal.
Possibly to the ECU.
The chamber sits in the engine bay on the shelf to which a tube is attached to its edge - does anyone else have this chamber and if so where is the long pipe connected?
Or is it now a redundant item?
Thanks again

Do feel free to ignore this but I'm following the same path as Deepfat. When I had my tf all this clutter had gone, but as with most changes done to cars there is invariably evidence left. I suspect what you have is the control bits to cut off the off side exhaust pipe during a particularly noisy rev range (rotten bastards). The inlet manifold creates a vacuum, which draws on the mysterious cylinder, the ECU decides when the exhaust pipe should be closed off, the cylinder opens, the vacuum acts on the exhaust control & shuts it off. If you have the actuator on the exhaust you must be one of a vanishingly small number & unless you want to return this facility bung up the manifold hole & bin the rest..
But do feel free to ignore.
M

Fits in with all thanks.
Presumably the manifold has already had the opening stopped. But where would it have been?
I can’t see the exhaust “flap” or connection and both pipes blow from idle - so that gells.
I now only need to check that the manifold connection is blocked. So where is or would it have been - plastic inlet manifold?

Meanwhile thanks to all for help so far.

I'll stay silent on this, I simply can't remember where the vacuum port was. It was aluded to a few weeks ago when another part of the same system cropped if for recognition, if you track that post down & contact the member concerned they may well know.
M

Ta very muchly.

https://rimmerbros.com/Item--i-GRID018869

Found it - but still cant find the connection

It's supposedly on the Trophy - Thought mine was a standard 135 - no info saying anything else.

It's the :- Dual Mode Vacuum System - MGF Trophy and MG TF

Is it for an exhaust flap????????

Now there’s a thing, it looks like I’ve been peddling duff gen.
I’ve seen this diagram before but failed to understand what it’s about, a clear case of it doesn’t apply to me therefore why pursue it.
So shall we start afresh & find out what it does. You’ll have to lead on this as you’ve got part of the story & I would like to find out it’s function.
It’s a shame it’s not the exhaust valve control, that all made sense, now I’m happy to learn some new facet of the cars.
Sorry for leading you up the garden path!
M

No probs - the plot thickens.
Perhaps Rimmers know - we'll see.

Roger Parker (who knows a thing or two about Fs & TFs) says: "When fitting a new exhaust to a car originally fitted with an exhaust valve, it is important to leave the electrical connections to the exhaust control valve, otherwise the engine ECU can throw up a fault". The "exhaust control valve" is the part in your first picture.

It is possible your car has a modified or re-programmed ECU, but if that exhaust control valve was connected to the wiring loom when you first started working on the car, I would advise taking Saint Roger's advice and re-connect it electrically, but leave the pneumatics unconnected.