Red S2 avant

[twoqu]

Are you 100% sure it has a Homefries? The reason I ask is that wastegate mod would not be necessary on what we refer to as Homefries.
Its a shame you haven't spent some £ on a better method of fault code reading. Even an old Vag com would gives you some more info that might be useful other than just codes. For example you wouldn't get full boost without the ecu seing a certain full throttle value which is easily observerable with Vag com/VCDS. Again the reason I mention this is because you have had a TB issue previously. Perhaps you know someone locally who might be able to plug theirs in just to check a few things.

[Error404]

Sounds like you have a combination of issues. Check the boost line to the ECU for damage or cracks, and boost leak check. If that doesn't solve it I would look at the N75

[andy j]

Surely the Homefries ecu should be nearer 1.4 bar. The stock ecu being in the 1.1 bar region.
So whilst there has been an improvement you are still not getting full boost by the sound of it.
It might actualy be the MFTS that is faulty as disconnecting the connector means the ecu does not see the signal and therefore does not limit boost. So if it limits boost connected and doesen't when disconnected that sort of implies the MFTS.
Not sure what combination of bits you have used to reassemble the wastegate but that might need a bit of investigation! With a stock spring and preload I think it should be nearer 0.4bar mechanical with the WGFV disconnected. You seem to be a bit higher.

I have just tried with the MFTS and WGFV disconnected and it is only boosting to 0.4 bar which will be spring pressure. I will focus on the MFTS just now. Then see if i can find any other problems and hopefully i can find the extra boost to bring it up to 1.4 bar.

[twoqu]

Surely the Homefries ecu should be nearer 1.4 bar. The stock ecu being in the 1.1 bar region.
So whilst there has been an improvement you are still not getting full boost by the sound of it.
It might actualy be the MFTS that is faulty as disconnecting the connector means the ecu does not see the signal and therefore does not limit boost. So if it limits boost connected and doesen't when disconnected that sort of implies the MFTS.
Not sure what combination of bits you have used to reassemble the wastegate but that might need a bit of investigation! With a stock spring and preload I think it should be nearer 0.4bar mechanical with the WGFV disconnected. You seem to be a bit higher.

[andy j]

So I just took the MFTS plug of and went a drive on my lunch break. The car is now boosting to 0.9 bar and is a lot quicker. So I'm still at full boost but the plug seems to be one of the problems!
So I've just ordered some terminals from here:

http://www.vehicle-wiring-products.eu/product.php/603/female-terminal

[andy j]

If MFTS circuit is causing a false over temp signal, ECU will cut boost to wastegate pressure as it thinks the engine is overheating. Disconnect the MFTS to prevent it.
Other than MFTS AFAIK the only other reason the ECU will cut boost to WG pressure will be a knock sensor fault, this should throw a code. Otherwise you problem is mechanical I.e. N75 or MAP sensor wiring or plumbing issue

I had a problem with the MFTS plug. I changed the plug but I wonder if the wires were damaged.
I'm of from the 24th til the 5th. So that should give me plenty time to check everything that's has been suggested.

[Error404]

If MFTS circuit is causing a false over temp signal, ECU will cut boost to wastegate pressure as it thinks the engine is overheating. Disconnect the MFTS to prevent it.
Other than MFTS AFAIK the only other reason the ECU will cut boost to WG pressure will be a knock sensor fault, this should throw a code. Otherwise you problem is mechanical I.e. N75 or MAP sensor wiring or plumbing issue

[andy j]

which kit exactly you have ordered ?

https://jhmotorsports.com/shop/catalog/transmission-parts-c-21_56_60_102_26.html

as I understood all kit parts fitted without problems ?

This is the kit I ordered:

https://jhmotorsports.com/shop/catalog/01e-speed-full-rebuild-kit-jhm-performance-jhm-updated-collar-p-2054.html?cPath=21_56_60_102_26

I went for the kit with the updated jhm collar instead of the OEM collar.

[sailaz]

and i decided to get myself a JHM full carbon synchro kit

which kit exactly you have ordered ?

https://jhmotorsports.com/shop/catalog/transmission-parts-c-21_56_60_102_26.html

as I understood all kit parts fitted without problems ?

[UrS4boy]

I will give the disconnecting electrically it a go. What should I be looking for when I disconnect it? The car is already acting like it's only working of the spring pressure only.

Probably because your N75 is not connected to the ECU or the ECU is not getting a properly boost pressure signal to the internal MAP sensor.

N75 info (again): http://forums.quattroworld.com/s4s6/msgs/20987.phtml

G71 MAP sensor info: http://forums.quattroworld.com/s4s6/msgs/20417.phtml

[andy j]

For the low boost try disconnecting the MFTS electrically. Next stop would be possibly the knock sensors. Have you pulled any codes?

I will give the disconnecting electrically it a go. What should I be looking for when I disconnect it? The car is already acting like it's only working of the spring pressure only.
I fitted two new knock sensors not that long ago. My code reader has stopped working. Will get a new one ordered up.

[andy j]

Andy how are you finding the solid subframe bushes?

Both front and back are solid bushes on mine and I don't mind them. My front subframe bushes were totally shot so if anything they are better.
Yeah, 034 parts from what I've experienced are pritty crap!
The shifter bush has loosened off and is feeling really good now.
The LM's are my favourite part of the car!

[twoqu]

For the low boost try disconnecting the MFTS electrically. Next stop would be possibly the knock sensors. Have you pulled any codes?

[Error404]

Andy how are you finding the solid subframe bushes?

[Error404]

Nice job Andy
Glad you got the linkage sorted in the end, as Mac said 034 parts are too often are a shower of ****. I never understand how they seem to be successful :l
Every time I see your car I want LMs