User Tag List

Thanks Thanks:  0
Likes Likes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Over boost?

  1. #1
    Regular Member Durk's Avatar
    Join Date
    Aug 2007
    Location
    N. Ireland
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    confused Over boost?

    I own a 2.2 dti sri vectra. And since getting it 6 months ago the car drop's on power on small hills at low rev's. but as soon as its switched off and on again it goes fine. If i drop her a gear up the hills shes ok but in fifth the car die's and put up a spanner on the dash. i've replaced the pipes around the engine, turbo and vacum pump, but got a tech2 done and the guy says its over boosting and will not tell me what part i need, and that to leave it with him so he can fix it. But i wanted the garage i bought the car to do the work for me. Any ideas wot i need done? or part?

    Thanks Alan

  2. #2
    On a Sabbatical
    Join Date
    Aug 2006
    Location
    member of the smoke patrol 230bhp+
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    did he tell you how he knows its over boost's

    i bet he can see something you have missed that's why he telling you to leave it with him to fix,,

    overboost sholdn't kill the power but a turbo pipe leaking will and put the spanner light on

    pm nutron and he may have a quick fix to find out what up with the car

  3. #3
    Regular Member Durk's Avatar
    Join Date
    Aug 2007
    Location
    N. Ireland
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    He wouldnt say what the fault was. it could be somthing simple but i didnt feel as i could trust him to work on the car. like he could of charged me for something i dont need

  4. #4
    Regular Member integrale's Avatar
    Join Date
    Nov 2007
    Location
    Mansfield Woodhouse
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    If you have over boost you would be pulling up hill's etc no probs and in 5th you would be no problems you would feel like you have more power...

    I had the same problem in my old FIAT turbo diesel... One of the vacuum pipes going into the boost valve had a split in the end as you plug it into the valve, by cutting the end flush would cure the problem till it perished again.

    You said you have replaced the vacuum pipes, just check to see if the end split.

    My opinion is that the guy who said that you are over boosting has already found the problem and don't want to tell you as it's a quick fix. where as you getting him to fix it will cos you more...

    Tim

  5. #5
    [Ex]Admin Duncan's Avatar
    Join Date
    Jun 2005
    Location
    East Sussex
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    You've definitely checked, or replaced, all the boost pipes? Split boost hose on the 2.0/2.2 DTi is a comon problem. Often the split is on the underside of the hose and not easily spotted. It sounds suspiciously like that. The split will cause a loss of pressure, so the car will momentarily try to boost more - causing more overboost than it should, hence the spanner light as the car detects the out of range readings.

  6. #6
    Regular Member Durk's Avatar
    Join Date
    Aug 2007
    Location
    N. Ireland
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    yeah all the pipes were checked on thurs again. i thought it was just a pipe as everything else is new. How many boost pipes is there? Duncan i have the same idea as you the if the pipes have split the car will try to boost more. but i cant find any split. cars booked back in for tuesday again to the garage. Hope its sorted this time

  7. #7
    Regular Member nutron's Avatar
    Join Date
    Jul 2005
    Location
    South Central England
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    Default

    It might drop into limp home mode if the boost went too high, I'm not sure how the ECU on the 2.0/2.2 DTIs would react to said. When I was pushing my turbo through manual tweeking the ecu would throw a fit at about 120mph in 5th, what ever revs that equates to. Can' think of a good reason for the boost to suddenly start going mental though, except a broken turbo... Have you checked the waste gate vacuum line and the vacuum pump itself?

  8. #8
    Regular Member Durk's Avatar
    Join Date
    Aug 2007
    Location
    N. Ireland
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    The vacum pump is brand new 3 months ago. running out of ideas wot it might be. hoping the garage will find the prob this time

  9. #9
    [Ex]Admin Duncan's Avatar
    Join Date
    Jun 2005
    Location
    East Sussex
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default

    Quote Originally Posted by nutron View Post
    Can' think of a good reason for the boost to suddenly start going mental though, except a broken turbo... Have you checked the waste gate vacuum line and the vacuum pump itself?
    It could be a number of things - split hoses, wastegate actuator sticking, wastegate itself i.e. the disc loose/come off as happened to me recently.

  10. #10
    Regular Member nutron's Avatar
    Join Date
    Jul 2005
    Location
    South Central England
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    Default

    Good point Duncan a sticky waste gate would definatly do it, that's well worth looking at Durk.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. No Boost/Irregular Boost
    By Seery_SRI in forum Engine & Drivetrain
    Replies: 5
    Last Post: 8th March 2011, 08:48
  2. boost flat spot boost????
    By lgtuk in forum Engine & Drivetrain
    Replies: 14
    Last Post: 7th June 2010, 16:14
  3. CDTI 150, 10k Boost De-Coked & New Boost Sensor
    By Vaux-Man-G in forum Vectra C / Signum Car Chat
    Replies: 7
    Last Post: 4th January 2010, 12:02
  4. no power off boost then savage boost at 2300rpm
    By 9tjc in forum Engine & Drivetrain
    Replies: 0
    Last Post: 2nd January 2010, 00:21
  5. cleaned boost sensor and still shows over boost
    By chowwie in forum Engine & Drivetrain
    Replies: 2
    Last Post: 14th November 2008, 09:23

Visitors found this page by searching for:

Nobody landed on this page from a search engine, yet!

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •