2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Green/white check valve, where does it go?

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Old Sep 1, 2016 | 01:17 PM
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Green/white check valve, where does it go?

Hi guys, finally getting around to reassembling the manifolds on my S5 NA. Theres a green and white check valve the has a hose going to a tee (not the one under the UIM, I never took that one off), (I think) one end goes to power steering, but not sure where the other attach.. back of the UIM I assume. The manual just isn't quite clear enough for this wannabe rotary guy. Can you please maybe attach a pic of an engine bay showing where these go? Showing all the other vac lines won't upset me either..I dont want to hook them up incorrectly.
Thanks!
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Old Sep 1, 2016 | 02:24 PM
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There are only two check valves on the S5, the one you're probably interested in goes to the secondary throttle on the throttle body.
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Old Sep 1, 2016 | 02:50 PM
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Originally Posted by clokker
There are only two check valves on the S5, the one you're probably interested in goes to the secondary throttle on the throttle body.
Thanks clokker, I think thats right, but this is my 1st try at doing all this, can you give me an idea of where exactly it goes? There are 2 ports on the back of the throttle body, I need to know where the other end goes as well. Sorry to be so darn needy..
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Old Sep 1, 2016 | 03:06 PM
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While we're at it, I need a bit of guidance on these as well..
Attached Thumbnails Green/white check valve, where does it go?-vacport1.jpg   Green/white check valve, where does it go?-vacport2.jpg  
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Old Sep 1, 2016 | 03:34 PM
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From: Mile High
There are vacuum schematics and more info on the throttle body in the Fuel&Emissions section of the FSM.
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Old Sep 1, 2016 | 04:29 PM
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Originally Posted by clokker
There are vacuum schematics and more info on the throttle body in the Fuel&Emissions section of the FSM.
Yes I've printed that out and have been using it as best I can. I'll eventually figure it out or drive to Landers place, maybe he'll have an FC I can look at for comparison.
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Old Sep 1, 2016 | 04:48 PM
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Oh, OK.
I've deleted my secondaries (tertiaries?) and have none of the support hardware, so I'm not much use here.
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Old Sep 1, 2016 | 05:06 PM
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Yes this one's bone stock.
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