hi all, this is my first post on audiforums.com

me and my friend have been tinkering with his 2002 audi tt quattro for the past few weeks and we cannot seem to figure out what is causing 2 codes to pop up. the first code is 1136, and the second is 1476. i have noticed one of the sensors has 2 pipes that are not connected to anything. i was hoping some one could point out where they(or the sensor) hooks up to. i have a rough picture that i found off of the internet similar to the sensor that i am referring to



the sensor that is hooked up to the open pipe where the air filter would go. we have a stock pipe not like the one above. could any one possibly help me out with where that sensor hooks up to on the stock piping?


also a little background info on the car: it has been modified with a newer turbo, converted from 5bolt to vband, new intake manifold, new injectors, new plumbing in a few places. as well as upgraded throttle body and a boost controller. as far as i know, the sensors are all original including the o2 for the wideband. anything else needed for any other info to complete the issue(s) above, just let me know and ill be glad to help.

 

are you talking about the n75 valve? on the stock awp engine piping it mounts on the side closest to the firewall, below the strut bar

 

i went and took a few pictures just to clarify which ones i was talking about.

this ^ leading into this:


the valve that has no connections on it to the right, follow the rubber line to the valve and you will see which one i am speaking about. i still have no idea where it hooks up to.




as far as the other issue goes. has this ever gone bad before on the tt quatros? ive been lead to assume it has

 

The n75 valve should be in the tip with an electrical connection, one vac line coming from the pipe on the turbo outlet and another one running to the waste gate.

Number 7

http://imageshack.us/photo/my-images...awpvacdiag.jpg

 

so wait, let me get this right, it goes from the waste gate to the hard line on the firewall? what if an after market filter was used?

 

here are a few more pictures i just took








none of this makes any sense. the routing, the way **** was capped off. none of it.
is it possible to put a "T" in the middle of the boost controller and the waste gate and hook it back to the hard line? with the assumption it would be hooked back up to the intake filter.

 

It looks like ur friend replaced the n75 with the greddy boost control valve whn the turbo was swapped, but capped the vac ends of the n75 but left the harness plugged in to stop the Ecu from throwing a CEL, so the greddy boost controller is controlling boost but the n75 is still plugged in so the Ecu doesn't sense anything wrong, at least thts wht I can tell from the pic, I could be wrong

 

ding ding ding

 

Haha

But the first pic of this thread threw me off, at first I thought u were mounting the n75 valve in the wrong spot / configuration

 

so here is the REAL question: can it be hooked up and used still while the greddy gauge is hooked up?