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-   -   Was cleaning throttle body, accidentally broke this tiny tube that no one talks about (http://986forum.com/forums/showthread.php?t=69374)

chromecarz00 10-08-2017 09:14 PM

Was cleaning throttle body, accidentally broke this tiny tube that no one talks about
 
I've only been able to find it on 1 diagram and in none of the instructional videos online, so I have no idea what it is. Maybe a vent tube?

Anyone know if it's crucial? There are 2, one in each side and it appears to come from the fuel rail?

https://imgur.com/a/y4UsT

Quadcammer 10-09-2017 03:57 AM

its a vacuum tube, i believe that one goes to the vacuum canister. Will be a vacuum leak with it disconnected.

The other side goes to the fuel pressure regulator if memory serves.

78F350 10-09-2017 06:56 AM

Quote:

Originally Posted by chromecarz00 (Post 551791)
... Anyone know if it's crucial? There are 2, one in each side and it appears to come from the fuel rail?

That looks like the line that connects the intake to the fuel pressure regulator on the fuel rail (left front). The intake provides vacuum to regulate the pressure. (B) to (C) in the second picture.
http://986forum.com/forums/uploads02...1507560669.jpg

The other vacuum hose connecting to the intake provides for a few functions depending on the year and transmission: Secondary air injection system activation, resonance flapper valve activation, and Tiptronic transmission cooling.
http://986forum.com/forums/uploads02...1507560886.jpg

chromecarz00 10-09-2017 10:16 AM

That's what I was afraid of, a vacuum tube. Any ideas on how to fix or replace? I can't even find out for sale anywhere

Anker 10-09-2017 10:41 AM

All auto parts stores have them. Best are high temperature silicone. Rubber less so.

marck 10-09-2017 05:26 PM

Quote:

Originally Posted by Anker (Post 551851)
All auto parts stores have them. Best are high temperature silicone. Rubber less so.

Yes. I recently broke one of the ones on the other side. I think the parts store had 3/16" that fit. 1/8th" is too small. Take a piece of it with you to the parts shop.

Getting at the other end where it attaches may be the hardest part.

chromecarz00 10-09-2017 06:04 PM

you're right, i cant find where it attaches on the right side...98 non s, manual transmission- any ideas? left one is attached albeit a little loose

marck 10-10-2017 03:32 AM

Quote:

Originally Posted by chromecarz00 (Post 551924)
you're right, i cant find where it attaches on the right side...98 non s, manual transmission- any ideas? left one is attached albeit a little loose

The's a number of articles on PelicanParts this one might help Porsche Boxster Fuel Injector Replacement - 986 / 987 (1997-08) - Pelican Parts Technical Article
In Figure 1 the purple arrow points to the pressure regulator which is item C in the image that 78F350 posted.

I haven't yet dug around for this on mine but it's likely under the air box on the left side. Try google for "boxster 986 fuel pressure regulator" for more

chromecarz00 10-10-2017 10:18 AM

I found where it's attached. Now I cant find the little part that came out. *rollseyes*

Anyone have a part number? It's from the vacuum source to the "y"

Can't find on any diagrams either

Or can I just use the 3/16" tube? Will it fit in the vacuum hose?


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