Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > 700/900 Series General

Notices

700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

Vac hose turbo

Views : 772

Replies : 10

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Feb 17th, 2020, 19:41   #1
mhuk
Senior Member
 

Last Online: Mar 1st, 2024 09:41
Join Date: Mar 2009
Location: London
Default Vac hose turbo

Can someone please check the vacuum hose from the turbo valve goes?

I know it goes to the inlet manifold but which port?

Car is still having the stalling issues sometimes. I wondering if the vac line should have a bigger bore and fit into a larger port. Since my car is modded I can’t remember where it went or on what etc. Cheers Martin
Attached Images
File Type: jpeg 9E6E8627-ED9F-4045-BFAB-2745AC521581.jpeg (87.7 KB, 22 views)
__________________
Volvo 940 19T, Charge cooled, Chipped.
mhuk is offline   Reply With Quote
Old Feb 18th, 2020, 01:40   #2
Jebus
VOC Member
 

Last Online: Aug 13th, 2023 18:49
Join Date: Aug 2016
Location: Aberdeen
Default

just normal 4mm silicon hose will do and it goes up to the inlet manifold, having it off with mean the CBV doesn't operate and does cause stalling issues
__________________
1992 2.0 SE Turbo Wentworth, now with b230ft & M90

2005 S60 2.0T the baby T5
Jebus is offline   Reply With Quote
The Following User Says Thank You to Jebus For This Useful Post:
Old Feb 18th, 2020, 11:11   #3
mhuk
Senior Member
 

Last Online: Mar 1st, 2024 09:41
Join Date: Mar 2009
Location: London
Default

Cheers. I'm running 3mm hose if that makes a difference.
__________________
Volvo 940 19T, Charge cooled, Chipped.
mhuk is offline   Reply With Quote
Old Feb 18th, 2020, 12:50   #4
TonyS9
Premier Member
 

Last Online: Mar 4th, 2024 00:49
Join Date: Jul 2009
Location: Holywood
Default

Any stalling issues caused by the dump valve will only happen shortly after boost. It takes about 5s to bring the inlet pressure down to atm pressure if you keep the rpms up a little with no load. If you close the throttle during that time it will stall.

If that is what is happening, remove the dump valve and check the diaphragm for tears.

If its stalling in other circumstances then its probably not a dump issue.
TonyS9 is offline   Reply With Quote
The Following User Says Thank You to TonyS9 For This Useful Post:
Old Feb 20th, 2020, 12:24   #5
mhuk
Senior Member
 

Last Online: Mar 1st, 2024 09:41
Join Date: Mar 2009
Location: London
Default

Quote:
Originally Posted by TonyS9 View Post
Any stalling issues caused by the dump valve will only happen shortly after boost. It takes about 5s to bring the inlet pressure down to atm pressure if you keep the rpms up a little with no load. If you close the throttle during that time it will stall.

If that is what is happening, remove the dump valve and check the diaphragm for tears.

If its stalling in other circumstances then its probably not a dump issue.

It's prob because the turbo inlet came with a new one and it's junk. The inlet casing is machined really nicely but I guess they saved some penny's with the diaphragm.

Cheers
__________________
Volvo 940 19T, Charge cooled, Chipped.
mhuk is offline   Reply With Quote
Old Feb 20th, 2020, 12:46   #6
TonyS9
Premier Member
 

Last Online: Mar 4th, 2024 00:49
Join Date: Jul 2009
Location: Holywood
Default

Its pretty easy to check, just remove the 3 bolts that hold the dump valve.

I actually sowed mine up and added some rubber solution (more as a check to see the problem was solved). Worked fine before I got the turbo reconditioner (who had caused the problem) to replace it.
TonyS9 is offline   Reply With Quote
Old Mar 6th, 2020, 13:38   #7
mhuk
Senior Member
 

Last Online: Mar 1st, 2024 09:41
Join Date: Mar 2009
Location: London
Default

Hi mate,

I put the original back in and still the same. Frustrating as feck.

Anything else?

Cheers

Martin
__________________
Volvo 940 19T, Charge cooled, Chipped.
mhuk is offline   Reply With Quote
Old Mar 6th, 2020, 17:22   #8
TonyS9
Premier Member
 

Last Online: Mar 4th, 2024 00:49
Join Date: Jul 2009
Location: Holywood
Default

Are you getting vaccum at the manifold nipple and/or at the turbo end of the pipe?

Is it definately stalling only after boost, like after accelerating hard?
TonyS9 is offline   Reply With Quote
Old Apr 1st, 2020, 20:09   #9
mhuk
Senior Member
 

Last Online: Mar 1st, 2024 09:41
Join Date: Mar 2009
Location: London
Default

Cone air filter. Removed and put the oem filter and it's happy as larry the lamb!

Stupid me!!! Top tip don't fit a cone filter it's a bad idea as per the rest of the internet.
__________________
Volvo 940 19T, Charge cooled, Chipped.
mhuk is offline   Reply With Quote
The Following 3 Users Say Thank You to mhuk For This Useful Post:
Old Apr 3rd, 2020, 21:38   #10
rockheadrumble
Senior Member
 
rockheadrumble's Avatar
 

Last Online: Sep 7th, 2020 22:54
Join Date: Jan 2011
Location: Kendal
Default

Thanks for the thread Martin.

I have the same issue so I will try a standard airbox and filter when i get the car back out of storage.

Thanks

Joe
__________________
HOLSET/new 3" exh+531 being installed(watch this space!) VXR 470cc injectors,960maf, 3" throttle,AEM AFR wideband, Forge MBC, Boost gauge, TTV Billet fly+850r clutch, Locker diff mod, Lowered 40mm,B4 bilsteins,Adj panhard rod,Cone filter.247400miles!
rockheadrumble is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 08:58.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.