I have a 90s quattro 1995 with manual transmission nd the EGR system. I took off a bunch of vacuum tubes when replacing head gaskets and now am stuck on where 2 of them lead to. If you have the engine please take a look for these two and let me know: both are on drivers side of the throttle body. Look for a big black plastic tube which comes out of the rear of the driver side head and attaches to the black air duct which goes into the back of the intake manifold. It attaches on the side, and 1 inch away from where it attaches is a little 1/8 vacuum hose cocming out of the same black air duct. I think this has something to do with the EGR system but does not go to the EGR valve, maybe over to the air filter side? The 2nd one is very near to the first but about 4 inches foward, coming out of the intake manifold. The plastic duct enters the intake manifold in the rear and maybe another 2 inches toward the front of the car, driver side of the throttle body is another vacuum hose the same size. This I also believe has something to do with the EGR and might connect over by the air filter. If you can tell me what these two hoses go to, or take a picture of the items i will appreciate it VERY MUCH. I know this is asking a lot but please help out cause audi vacuum system diagrams do not show this for me and I forgot to take pictures or draw my own.

Mike

 

Oh yea and you can either reply to this or email me xitsmike@optonline.net.

 

I emailed you a I diagram that I think will help