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03 a4 1.8t vaccum problems... maybe a valve?

Got an 03 A4 1.8t. Lightly chipped and no other modifications.

Heres the issue. Under acceleration I can hear a hiss from the engine compartment. No noticeable change in performance but sometimes when I come to an idle, its rough and I can hear a little hiss. I get out.. pop the hood and identify the source of the his... and give it a thump. The valve snaps itself together, the hiss goes away and the idle returns to normal. What valve is this? Does it normally snap apart like its doing? If I removed it from its assembly I believe it would just fall apart. Is that normal?

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is a shot of the engine compartment with the questionable valveslocation circled.

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is the actual valve. You can see the dust free fingerpriunt onthe side when Ive been pushing on it to pop it back into place. Any ideas?

Jake

Reply to
jake
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Its not normal. i'm forgetting the name for it and its proper function, but its part of the vacuum line and its linked to the brake system. Apparently its a pretty common problem with Audi. I just taped the split together (where it keeps popping out from) and drove my car for about a month until I got a chance to change it. Easy fix, took about 30 minutes in all, part cost less than $50

Reply to
Sami D.

Ok... I took the valve out. Its a suction pump. part #058 133 753 b.

Why would the end pop off of it like this? Is this a sign of some other problem in the vacuum system? The valve (or pump, as its called) didnt fail or clog, that I can find. It just seperated into two pieces. Being held together by the tension of the hoses that it uses to function.

here is the whole pump....

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and here it is with the valve assembly snapped apart
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Is the popping apart of the pump a safety measure to keep something else more vital from exploding?

Jake

Reply to
jake

apart

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the part is called a suction jet pump not sure what it do yet but i have the same problem it's only $33 at audi i have one on order

Reply to
spencer.walker

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