User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 7 of 7

Thread: EGR Valve, what does it do?

  1. #1
    Regular Member arkhan78's Avatar
    Join Date
    Nov 2007
    Location
    Leeds
    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 EGR Valve, what does it do?

    Hi all

    i got the dreaded spanner light come on yesterday afternoon while stuck in traffic and the car went to limp mode, wouldnt go above 2k revs and above 30mph.

    Managed to get the car home, switched it off and started it up again and everything was back to normal.

    However driving to doncaster today at a steady 65mph keeping revs below 2500 the spanner light cam on again.

    The Egr was cleaned last week after Kman did a fault code check on it. (CHEERS MATE).

    So tomorrow everything is going to be disconnected and a new egr valve fitted, booster cleaned.

    Should i do anything else to ensure this doesnt happen again?

    Also what does the egr do? will i see improved performance with a new egr?

    Cheers in advance

  2. #2
    Regular Member
    Join Date
    Oct 2009
    Location
    Teesside
    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

    Hi mate, cleaned mine last night and wow what a different, was full of so much sh*te!!!

    You can buy a can of EGR cleaner that you can spray through your hosing to the valve (whilst revving the engine) and this cleans the crap off, you could do this every couple of months I suppose.

    Hope this helps

  3. #3
    Regular Member solorider's Avatar
    Join Date
    Sep 2006
    Location
    swindon
    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

    Vehicle : Vectra

    Trim : Design

    Engine : 1.9 120bhp

    Year : 2004

    Mileage : 139,600

    Default

    what does the egr do,here is an explanation http://en.wikipedia.org/wiki/Exhaust_gas_recirculation

  4. #4
    Regular Member Grimo72's Avatar
    Join Date
    Apr 2008
    Location
    Lincs
    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

    In modern diesel engines, the EGR gas is cooled through a heat exchanger to allow the introduction of a greater mass of recirculated gas. Unlike SI engines, diesels are not limited by the need for a contiguous flamefront; furthermore, since diesels always operate with excess air, they benefit from EGR rates as high as 50% (at idle, where there is otherwise a very large amount of excess air) in controlling NOx emissions.
    Since diesel engines are unthrottled, EGR does not lower throttling losses in the way that it does for SI engines (see above). However, exhaust gas (largely carbon dioxide and water vapor) has a higher specific heat than air, and so it still serves to lower peak combustion temperatures. There are trade offs however. Adding EGR to a diesel reduces the specific heat ratio of the combustion gases in the power stroke. This reduces the amount of power that can be extracted by the piston. EGR also tends to reduce the amount of fuel burned in the power stroke. This is evident by the increase in particulate emissions that corresponds to an increase in EGR. Particulate matter (mainly carbon) that is not burned in the power stroke is wasted energy. Stricter regulations on particulate matter(PM) call for further emission controls to be introduced to compensate for the PM emissions introduced by EGR. The most common is particulate filters in the exhaust system that result in reduced fuel efficiency[citation needed]. Since EGR increases the amount of PM that must be dealt with and reduces the exhaust gas temperatures and available oxygen these filters need to function properly to burn off soot, automakers have had to consider injecting fuel and air directly into the exhaust system to keep these filters from plugging up.



  5. #5
    Regular Member arkhan78's Avatar
    Join Date
    Nov 2007
    Location
    Leeds
    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

    Cheers chaps....loads of bed time reading

    anyway mate dropped off the new egr

    ITS SO SHINY

    Attachment 26673

    Attachment 26674

  6. #6
    Regular Member kman247's Avatar
    Join Date
    Nov 2008
    Location
    milton keynes
    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

    nice and shiny mate , hope it sorts the problem out for you , next time you are down my way , i'll clear all the codes for you

  7. #7
    Regular Member arkhan78's Avatar
    Join Date
    Nov 2007
    Location
    Leeds
    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 kman247 View Post
    nice and shiny mate , hope it sorts the problem out for you , next time you are down my way , i'll clear all the codes for you

    Yes i hope so too...had to buy it as cant afford to be stuck on the motor way on limp mode! Got a bargain though £150

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Brake servo Valve (one way valve)
    By Tank988 in forum Suspension, Wheels & Brakes
    Replies: 5
    Last Post: 29th October 2012, 19:48
  2. Replies: 6
    Last Post: 29th July 2012, 13:52
  3. Egr valve, swirl valve problems etc..
    By Vicsterb in forum Engine & Drivetrain
    Replies: 9
    Last Post: 12th January 2011, 15:53
  4. EGR valve / Swirl valve
    By SwavGav85 in forum Engine & Drivetrain
    Replies: 7
    Last Post: 5th January 2009, 17:17
  5. EGR valve and Swirl Valve
    By TUX-VECTRA in forum Vectra C / Signum Troubleshooting
    Replies: 3
    Last Post: 6th July 2007, 00:43

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
  •