Cut tube on blowoff valve?
#1
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Location: Cupertino, CA
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Car Info: 2008 Audi RS4 Ibis/Ti
Cut tube on blowoff valve?
I noticed that there was a cut tube on my blow-off valve, it looks like someone tapped off the main tube with a smaller one, but then never connected it. When the car is idling, there is a small amount of hot air blowing out of it. Is this normal? Can someone with a 08 STi check their car and see if it is set up like this?
#2
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that location of where it was T'd looks like it used to have a boost gauge of some sort. at least thats where mine is cut, and that tube leads into the cabin to my boost gauge. if you're not gonna hook up the boost gauge, remove the T and connect the two hoses with a barb fitting.
#6
That's a manifold vacuum line. It should definitely be sealed, but also you should not be feeling hot air coming out. At idle there should be vacuum on that line so you should feel suction on it.
#7
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Car Info: 2008 Audi RS4 Ibis/Ti
I sealed the tube today, and it seems to have made a big difference to the performance of the car. I am not sure if it is just a placebo effect, but the car seems to pull harder at lower RPMs, and I have averaged 3mpg higher today than previous days.
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