White Tube Throttle Area

wmydlarz · Apr 26th, 2020, 15:29

Hi all,

Been having a nosey under the bonnet of my 98 V70 as I have suspected PCV issue with smoky dipstick (different story).

Heard a sllight hissing sound with the engine running, and found that a thin white tube has worn through from rubbing on the throttle cover so that it has a hole in it. It runs from the throttle area to a sensor looking thing above the fan.

When it's moved and the hole is opened/closed the revs change. I've taped it up for now to close it.

What is this line for and where would I find a replacement, what to search for ec. The rubber boot on the manifold end is also a bit perished so looks like it could do with replacing.

Cheers,
Bill

wmydlarz · Apr 27th, 2020, 09:52

To help clarify, I've added an image with the tube in a box

Cheers
B

4x4 · Apr 27th, 2020, 12:42

The white tube is most likely a vacuum pipe to possibly an EVAP solenoid or a pressure sensor. Volvo dealer will be able to supply the correct pipe and elbows

Apr 26th, 2020, 15:29	#1
wmydlarz New Member Last Online: May 28th, 2022 09:56 Join Date: Mar 2016 Location: East Devon	White Tube Throttle Area Hi all, Been having a nosey under the bonnet of my 98 V70 as I have suspected PCV issue with smoky dipstick (different story). Heard a sllight hissing sound with the engine running, and found that a thin white tube has worn through from rubbing on the throttle cover so that it has a hole in it. It runs from the throttle area to a sensor looking thing above the fan. When it's moved and the hole is opened/closed the revs change. I've taped it up for now to close it. What is this line for and where would I find a replacement, what to search for ec. The rubber boot on the manifold end is also a bit perished so looks like it could do with replacing. Cheers, Bill

Apr 27th, 2020, 12:42	#3
4x4 Premier Member Last Online: Today 08:57 Join Date: Dec 2017 Location: North of Hadrian's Wall & South of Antonine's Wall View Photos By: 4x4	The white tube is most likely a vacuum pipe to possibly an EVAP solenoid or a pressure sensor. Volvo dealer will be able to supply the correct pipe and elbows __________________ MY2010 XC90 SE (M66-manual) Magic Blue (467) Sold MY1997 850 GLT (62,000 miles) Silver Sand (419) MY2005 V70 2.5T (66,000 miles) Willow Green (471) Volvo 850 GLT website

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