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" > 850 / S70 & V70 '96-'99 / C70 '97-'05 General
Register Members CarsBlogs Help Calendar Mark Forums Read

Notices

850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 / S70 & V70 '96-'99/ C70 '97-'05 models

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

1999 v70r me7 strange boost

Views : 221

Replies : 7

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Jan 14th, 2019, 00:50   #1
andrewc1267
Senior Member
 

Last Online: Jan 18th, 2019 00:37
Join Date: May 2010
Location: manchester
Question 1999 v70r me7 strange boost

As above the car has a boost gauge fitted it's a manual gearbox model in 1st its makes 7psi driving hard the makes between 10 and 14 psi in higher gears driving hard car has lost its go its nippy but no where near like it used to be any ideas
andrewc1267 is offline   Reply With Quote
Old Jan 14th, 2019, 01:37   #2
Redskiies
New Member
 

Last Online: Today 02:26
Join Date: Jan 2019
Location: London
Default

my 1st idea is MAF, as mine had that problem...
2nd idea is the turbo actuator spring wore off? or one of the connecting bolts bent or somehow changed setup, and it leaks boost?
3rd is maybe the hose between the turbo and the engine (intercooler included) leaks boost somewhere?

maf is easy to check, just unplug it, and drive around, itll revert to emergency overfueling, but it'll try to use the turbo to its original setup...

air leaks are easy as well, if you go around with a spray bottle around the hoses...

actuator... good luck, theyre fairly cheap, but theyre straight up on the firewall
Redskiies is offline   Reply With Quote
Old Jan 14th, 2019, 10:58   #3
Cookeh
Senior Member
 

Last Online: Today 15:01
Join Date: Feb 2018
Location: Chesterfield
Default

First thing I'd check is definitely vacuum lines. Especially to the TCV. After that I would probably look at MAF, as suggested already. They are very easy to clean, which is definitely worth doing before you considering replacing it.
__________________
1995 Volvo 850 T5 Estate (Manual)
Cookeh is online now   Reply With Quote
Old Jan 14th, 2019, 22:26   #4
andrewc1267
Senior Member
 

Last Online: Jan 18th, 2019 00:37
Join Date: May 2010
Location: manchester
Default Thanks for replying

The car has had a replacement genuine maf today I smoke pro the intake system and found no leaks actuator and vac lines all good I scanned it today and it has no codes but has occasionally in the past has has codes relating to long term fuel trim
andrewc1267 is offline   Reply With Quote
Old Jan 14th, 2019, 22:35   #5
DSK
C70 T5
 
DSK's Avatar
 

Last Online: Yesterday 22:53
Join Date: Sep 2006
Location: Midlands
Default

Seems like its been covered in the above suggestions.

Sounds like yours is re-mapped with a 1st gear limit.

Personally, I'd get a smoke machine, connect it right after the MAF and test for leaks. Quick and easy.

Second, adjusting the actuator is easy as well and IPD volvo has a video on it.

MAF and TCV are possible culprits as mentioned above but, are easy to test/replace.
__________________

1999 C70 T5 Coupe Automatic
1998 S70R Automatic
2000 C70 T5 GT Coupe Automatic
1995 Toyota Supra Twin Turbo
DSK is offline   Reply With Quote
Old Jan 16th, 2019, 00:40   #6
andrewc1267
Senior Member
 

Last Online: Jan 18th, 2019 00:37
Join Date: May 2010
Location: manchester
Talking Solved

Hi that's for the suggestions the fault turned out to be both of the one way valves under the inlet manifold where stuck open and allowing boost to return to the air filter to turbo charger intake pipe replaced both and car is great
andrewc1267 is offline   Reply With Quote
Old Jan 16th, 2019, 20:33   #7
DSK
C70 T5
 
DSK's Avatar
 

Last Online: Yesterday 22:53
Join Date: Sep 2006
Location: Midlands
Default

Quote:
Originally Posted by andrewc1267 View Post
Hi that's for the suggestions the fault turned out to be both of the one way valves under the inlet manifold where stuck open and allowing boost to return to the air filter to turbo charger intake pipe replaced both and car is great
Thanks for the update.

Where did you get the valves from? I though they were no longer produced.
__________________

1999 C70 T5 Coupe Automatic
1998 S70R Automatic
2000 C70 T5 GT Coupe Automatic
1995 Toyota Supra Twin Turbo
DSK is offline   Reply With Quote
Old Jan 18th, 2019, 00:36   #8
andrewc1267
Senior Member
 

Last Online: Jan 18th, 2019 00:37
Join Date: May 2010
Location: manchester
Default

Quote:
Originally Posted by DSK View Post
Thanks for the update.

Where did you get the valves from? I though they were no longer produced.
I have a consumerbles spinner in my garage where I work there was loads in a drawer
andrewc1267 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 15:46.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.