changed my pcv stuff and a little confused on a few vacum lines. I found this diagram but doesnt look like mine was hooked up this way from the beginning, the diagram looks like an older version of the B5, I have a 2000 audi a4 ATW engine. Any one help me with the vac lines highlighted in red? Thanks fellas.



[IMG]local://upfiles/32050/BA8AE19357554C1BA3CAA0B229AE0992.jpg[/IMG]

 

must be late, please help when we wake from our slumbers.

 

Well....where did you find that diagram? I have an AEB and mine is not like that either. The vacuum line from the front of the intake manifold goes directly to the DV....in the picture you have, it shows a line from the front of the intake manifold going back to that red thing and then a line from the DV going into that red thing too. Anyway, if that is not your cars wiring schemetic, than don't worry abou it....

 

the valve on the bottom of the highlight is the Recirculating valve for turbocharger -N249- and the one above it is the Secondary air injection (air) solenoid valve -N112-. The N249 hooks to the main vac on the front of the intake manifold and also to the DV. The N112 controls the extra vac to the canister.

 

see attached ATW motor

 

You can bypass your N249. Hook the DV right into the intake manifold. The purpose of the ecu-controlled N249 valve is to control how much boost the DV gets, basically. If you bypass it, you need a resistor to fool the ECU, so you don't get a check-engine light for it. Same goes for the N112 (I'm still wondering why the wastegate also connects to the N112...), if you deleted your secondary air intake via FMIC, you need to resistor it so you don't get a CEL for it as well.

 

thanks guys for the help.I should be able to figure this out now after the breakdown from pimphell. Any other input is appreciated.
-sean

 

I have a question on the valve that is the upper one on the triangular plate (I think you are calling this the N112):

-Should it have a a right angle adapter on it that goes nowhere???

Mine goes nowhere, and I can't find a hose that woud go into it (the right angle looks like it would accept the small hard plastic lines for vacuum)

I'm getting a P0171 code immediately after the engine warms up fully.

I bought this car with a broken timing belt - after doing a bunch of work, it drives great except this code that comes on like clockwork.

2001 A4 1.8 Turbo with original head (AWM - will confirm)

Thanks.

 

My problem with the P0171 code is always the damm MAF sensor (Mass air flow sensor) Try cleaning it with mass air cleaner and see if the code goes away. You may have a leak in the intake tubing or the turbo pluming also, check that. My solve was to clean the MAF when that code was there. I got a new one because of miss-cleaning it with other products and the code dissapeared.

P0171- Fuel Trim,Bank1 System too Lean

 

#13 on the chart is the N112 valve
#19 on the chart is the N249 valve

The chart that you have is correct for the vehicle. Yours doesn't match that chart?