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Mysterious Vacuum Lines / Vacuum Tree Overview?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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erikv11
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Re: Mysterious Vacuum Lines / Vacuum Tree Overview?

Post by erikv11 » Thu Dec 31, 2015 11:10 am

Yes it is the turbo gauge in the dash, and yes you can have your spaghetti with no meatballs. The later year 850s did not have a turbo gauge. Cap it off at the tree if you don't want to fix it. You can also get new plastic pipe it is just more of a hassle.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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abscate
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Re: Mysterious Vacuum Lines / Vacuum Tree Overview?

Post by abscate » Thu Dec 31, 2015 7:55 pm

Well it's like potatoes without butter...no, wait, that's Idaho....it's like a highway without any corn....
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volvofornia
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Re: Mysterious Vacuum Lines / Vacuum Tree Overview?

Post by volvofornia » Fri Jan 01, 2016 3:04 am

Haha, well I'm vegetarian so I don't need the meatballs at all ;)

Will fix that pipe somewhen later. I have so much other stuff to work on at the moment that I will focus on the more important things.

One more question. So if the pipe to the Gauge has a leak that also means that th whole vacuum system is negatively influenced by it right?

Thank you guys as always and has happy new year :)
'94 850 T5 - 150k Miles - hopefully soon daily driver

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abscate
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Re: Mysterious Vacuum Lines / Vacuum Tree Overview?

Post by abscate » Fri Jan 01, 2016 5:56 am

You don't want any vacuum leaks in these cars. They will cause either codes or running problems to pop up. If your gauge is moving don't worry about it for now
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Re: Mysterious Vacuum Lines / Vacuum Tree Overview?

Post by volvofornia » Fri Jan 01, 2016 4:14 pm

Ok, I might shut these line off for now and worry about it at later.
'94 850 T5 - 150k Miles - hopefully soon daily driver

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Re: Mysterious Vacuum Lines / Vacuum Tree Overview?

Post by LaurelieV » Tue Feb 11, 2020 12:11 pm

I have a vacuum line that fell out from under my dash that's hard plastic snapped like
\_________/with a rubber elbow on one side. This found when trying to figure out hard starts when cold. And a pump like sound from drivers side under hood that goes on when I touch brakes then right back off. Where does this hose go and could it cause the hard cold starts

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abscate
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Re: Mysterious Vacuum Lines / Vacuum Tree Overview?

Post by abscate » Tue Feb 11, 2020 7:43 pm

Hmmm. You don’t have vacuum on a P2 dash like a P80

That whirring pump is your brake vacuum pump, that needs to be looked over carefully as it is important for safety.
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