Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Vacuum Hose Nightmare

Old 04-28-2018, 06:15 AM
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Default Vacuum Hose Nightmare

Nightmare might be an overstatement. I have every hose but one connected after a PCV & PTC clean and swap on a 94' 850 Turbo. The hose in question is the smaller one in the combo that comes from the breather box beneath the intake manifold and hooks back behind the engine. The large hose connects to the PTC valve on the turbo hose but I cannot for the life of me find out where the little hose connects. Any help would be much appreciated.
Old 04-28-2018, 08:52 AM
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Location: Kingsport, TN
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I know the answer to your question, but I am not 100% following you personally. I guess you are talking about the big and little hoses that are held together in a bundle, right? Originally using insulation.

The little hose connected to the plastic hose between the MAF and the turbo inlet.

Good diagram here a few posts down.

On my 94, this flow went through a heater that was mounted under the "volvo 20 valve" plastic cover. This heater was just a heater, but it added to the confusion.
Old 04-28-2018, 11:31 AM
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That diagram was the ticket. Thanks!
Old 04-29-2018, 07:34 AM
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For anyone who stumbles across this and has the same question. Here are the diagrams that Firebirdparts mentioned. I was referring to "10" on the diagram.
Attached Thumbnails Vacuum Hose Nightmare-air-intake-tube.jpg   Vacuum Hose Nightmare-ptc-valve.jpg  
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