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Old 04-29-2009, 11:47 AM   #1
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viggen question

just curious. on the viggen there is a quick disconnect line on the delivery pipe right by the throttle body. i have seen a few 9-3's without these. what exactly is its function? TIA
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Old 04-29-2009, 11:52 AM   #2
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Is it on the bend itself?
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Old 04-29-2009, 12:12 PM   #3
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yup right above where the hose clamp is, on the valve cover side, and is usually covered by the engine trim cover.
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Old 04-29-2009, 12:16 PM   #4
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is it part of the evap or crank case vent system?

for t7 it has been revised several times.
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Old 04-29-2009, 12:20 PM   #5
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thats what i was thinking, which would explain why some cars have it and some don't. i'm just wondering if it is part of the #6 update
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Old 04-29-2009, 12:21 PM   #6
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Its on the delivery pipe, not part of the PCV system update. The update is only the filler neck, the gromet into the valve cover, the oil seperator and hoses.

I have the same thing on my Aero and was wondering what it was for the other day. Maybe a T7 only thing, or B235 only thing.
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Old 04-29-2009, 12:23 PM   #7
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iirc some of the early updates mentioned tapping the delivery pipe now that i think about it. not positive though.
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Old 04-29-2009, 12:35 PM   #8
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actually now that i think about it the early ones tapped into the oil filler tube...

so yeah what is it's purpose?
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Old 04-29-2009, 12:39 PM   #9
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brake booster vac hose?
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Old 04-29-2009, 12:39 PM   #10
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Yeah thats what I was going to say. The new kit has the filler nick with the bung molded into it, instead of tapping it.

I have no idea... but mine has no hose attached. There aren't any loose hoses hanging around, so unless I somehow lost it entirely I am thoroughly confused.

I also have no hose running through the clip attached to the delivery pipe... where do both of these originate?

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Old 04-29-2009, 12:40 PM   #11
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http://www.eeuroparts.com/Main/PartD...px?id=55557389
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Old 04-29-2009, 01:01 PM   #12
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So I just went and checked and I dont think that is it abdukted.

It looks the same but I followed the vacuum line from my brake booster and it actually goes into the intake manifold(like the description on eeuro says) and there is this bushing there as well.

You can see the vacuum line from the brake booster in the pic above. Its the one making a 90deg bend right under the delivery pipe on the far right of the pic.

Here is the link for eEuro on the delivery pipe which says for 01-02(03 vert) 9-3's and all Viggens/9-5's... and another listed for 99-00 Viggens and early 9-5's...

The first has this thing, the second does not...

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Old 04-29-2009, 06:11 PM   #13
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^ Yours is a 2002? If so, I would say you are missing some plumbing for some odd reason.
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Old 04-29-2009, 06:24 PM   #14
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the mystery continues.
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Old 04-29-2009, 06:46 PM   #15
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Ok so somebody just follow where that line from the delivery pipe in question runs off to.



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Old 04-29-2009, 06:57 PM   #16
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mine doesnt have that...
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Old 04-29-2009, 07:05 PM   #17
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my friends 2002 SE auto had that too.


it was not connected to anything. when you pushed on it the idle changed, so we wrapped the little plug deal with teflon tape, and stuck it back in.


i have no idea what its for.
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Old 04-29-2009, 10:52 PM   #18
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I'll ask my friend whos a Saab Mechanic. I'm sure he'll know.
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Old 04-29-2009, 10:57 PM   #19
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Marty?
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Old 04-30-2009, 02:53 AM   #20
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Both my '02 and '01 Viggens have this line and it is part of the brake vacuum system.

The line from the manifold to the brake booster goes directly into some sort of cone shaped valve that has a third line that comes out of the side and runs into the intake pipe just above the throttle body. My guess is that under boost this valve prevents the pressurization of the brake booster.

I can take a photo of this tonight if you'd like?
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