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" > C30 / S40 & V50 '04-'12 / C70 '06-'13 General

Notices

C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 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

T5 only 0.3 bar boost and poor throttle response

Views : 1828

Replies : 20

Users Viewing This Thread :  

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old Jan 28th, 2019, 09:23   #1
Welton
Premier Member
 

Last Online: Sep 14th, 2021 18:03
Join Date: Feb 2009
Location: Market Harborough
Default T5 only 0.3 bar boost and poor throttle response

My lovely T5 has suddenly become lazy and I can't figure out why.

In July 2017 I changed the Turbo Control Valve (TCV) just for maintenance sake and replaced it for an OE Pierburg unit so that should be ok, the Vacuum lines all 'look' ok no real signs of chafing/splits. I've changed the little 'one way' breather valve on the turbo a few months ago. I've changed the Fuel Pressure Sensor couple of years ago. Air filter is good, loads of oil changes with top-spec stuff.

Throttle is kind of 'dead' and the car even sounds a bit quiet, no check engine light and only achieving 0.3 bar on my Torque Pro app.

One definite change is that I used to be able to hear the Compressor Bypass Valve (l think this is Volvo's equivalent of a Dump Valve?) sort of 'chatter' when maneuvering at low speeds and a 'whishhhh' sound between fast gear changes, this sound has gone so I'm wondering if the Turbo is not generating full boost because the bypass/wastegate is partially open.

Any suggestions please I'm sort of stumped and I hate the car feeling like this, I'm almost praying for the engine light to come on to give some clues.
__________________
2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale)
2010 Citroen C4 1.6 HDi (bizarre Gearbox model).
2010 Renault Twingo (refreshingly simple)
2018 Infiniti Q30 1.6T Business Executive (what's this button do?)
Welton is offline   Reply With Quote
 


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 01:18.


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