Car is a 97TA A4. I was under the car yesterday checking out some possible leak and noticed a plastic component with a electric connector and what appears to be 2 vacuum ports. It is located on the driver's side near the exhaust manifold. It was not connected at all, just bolted there. The wiring harness that fits it is hanging (unconnectd and plugged off) next to it. What is this and should it be connected? The car is completely stock (all EGR still there) except CAI and catback.

 

Can't think of it off the top of my head, but a picture would get you a quick answer I bet.

 

Can you get a pic, It's near impossible to tell you exactly what it is without looking at(for me anyways). Maybe shoebox or somebody else can tell you.

 

Is it on the back of the intake?

 

Could it have somthing to do with the ASR traction control?

 

I think you're looking at the sphincter bypass valve

 

I have no way of hosting a pic. It looked like it was bolted to the back/side of the intake. Thanks for the help though. Keep the ideas coming

 

lol

 

Maybe the EGR valve...

http://shbox.com/1/egr1.jpg

 

That should be the EGR soleniod valve.

 

Thanks for the pic but it doesnt look like that. I could only see it from under the car, between the driver header and the engine block. It is about the size of a fist, but not round. Thanks for the inputs.

 

is it a black round piece about the size of an altenator, is it in front of the manifold? this could be your smog pump....

 

Smog pump? Is it on the front of the engine, near the accessory belt?

 

well, i dont think that mine (1993) is belt driven, it is electric driven, but yea it is black and looks somewhat like an altenator with two hoses coming out the back of it, also called the A.I.R pump, look it up on yahoo, or something...a see a pic, it sits on the drivers side, right at the front under the CAI

 

Sounds like the oil pressure sender unit