User Tag List

Thanks Thanks:  0
Likes Likes:  0
Page 1 of 13 12311 ... LastLast
Results 1 to 10 of 125

Thread: EGR disconnection on 3.0 CDTI

  1. #1
    On a Sabbatical
    Join Date
    Aug 2006
    Location
    EVERYWHERE
    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 disconnection on 3.0 CDTI

    With reference to this thread. http://www.vectra-c.com/forum/showthread.php?t=51953 What are the advantages and disadvantages of blanking off the EGR from a tuning point of view ?

  2. #2
    Regular Member Danwells72's Avatar
    Join Date
    Jul 2006
    Location
    Northampton
    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 : Sri

    Engine : 1.9 cdti 150

    Year : 2004

    Default

    dont do it. it will throw havoc with the ecu

  3. #3
    Regular Member spatch's Avatar
    Join Date
    Aug 2007
    Location
    Kent
    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 Mugualigwian View Post
    dont do it. it will throw havoc with the ecu
    The 3.0 ECU does not throw up an error message if the EGR is blanked (unlike the 1.9CDTi I believe) - I understand it is something to do with MAF vs MAP. So from this point of view, it does not seem to matter on the 3.0CDTi.

    However, if your point is more specifically aimed at the fact that the ECU is programmed to compensate for the EGR, and blanking it has issues with fueling and timing, then I would be very interested in more details from you.

    Cheers,

  4. #4
    On a Sabbatical
    Join Date
    Aug 2006
    Location
    EVERYWHERE
    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

    Many of us with CDTIs have fitted K&Ns and done the airbox mod without a thought as to how it may affect the fuelling system.

    The added benefit of blocking off the EGR would appear to be (judging by the info in the link that spatch posted in the other thread) less soot emissions, which as far as our MOT is concerned is a good thing.

    My only concern is what state the EGR will eventually get into when it is opened and the exhaust gas and soot has nowhere to go.

    Also,if having the EGR disconnected helps the car to warm up quicker (due to slightly higher combustion temperatures),then that can't be a bad thing either.

  5. #5
    Regular Member spatch's Avatar
    Join Date
    Aug 2007
    Location
    Kent
    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 diesel dog View Post
    My only concern is what state the EGR will eventually get into when it is opened and the exhaust gas and soot has nowhere to go.
    I am not sure this would be too much of an issue. When I ran mine blanked, the pipe connecting the EGR valve to the inlet manifold was cool-ish. This meant that there was no flow of exhaust gasses any more as the pipe was blocked. As there is no flow through the EGR system anymore, I would not expect there to be much flow of exhaust gas past the EGR valve itself (EGR system in now static and at same pressure as exhaust manifold - it is just a dead leg within the exhaust system). I would not anticipate the valve to get any more gummed up than with it working as intended. In fact I would think it would remain cleaner.

    Ideally, you would blank the EGR valve upstream (i.e totally isolating it from the exhaust system) but this would be a much more difficult job.

    Cheers,
    Last edited by spatch; 13th July 2008 at 12:52.

  6. #6
    On a Sabbatical
    Join Date
    Aug 2006
    Location
    EVERYWHERE
    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 spatch View Post

    Ideally, you would blank the EGR valve upstream (i.e totally isolating it from the exhaust system) but this would be a much more difficult job.
    You can apparently 'turn off' the EGR when the car is remapped.Probably not difficult,but expensive.

    I can see your point in that the EGR will be just a "dead leg" in the system and since it will be open only during part/constant throttle periods there won't be an awful lot of soot/heat being put through it anyway.

    I've got the blanking plate sorted,I may just give it a try.

  7. #7
    On a Sabbatical
    Join Date
    Aug 2006
    Location
    EVERYWHERE
    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

    This article does tend to hold up the fact that disconnecting the EGR has more advantages than disadvantages.

    http://www.dieselpowermag.com/tech/0...kit/index.html

  8. #8
    Regular Member Kcs's Avatar
    Join Date
    Feb 2007
    Location
    Tamworth
    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

    It only has an advantage if your EGR is playing up, eg: sticking open !

  9. #9
    On a Sabbatical
    Join Date
    Aug 2006
    Location
    EVERYWHERE
    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 Kcs View Post
    It only has an advantage if your EGR is playing up, eg: sticking open !
    Correct! , its advantage is to increase engine power whenever the EGR would normally be open.

    Even on part throttle the engine produces power,this is when the EGR valve would normally be open.If the EGR valve were to be closed at part throttle then the engine would produce more power for the same amount of throttle opening due to the fact that the fuel entering the engine is not being diluted by the EGR.

    We don't always have to use full throttle to get decent performance and this is why disconnecting the EGR is potentially a good thing.

    It seems that the only trade off you get by disconnecting the EGR is an increase in NOx emissions.The advantages seem to be increased performance and improved fuel consumption,much less soot particles and longer engine life.

  10. #10
    On a Sabbatical
    Join Date
    Aug 2006
    Location
    EVERYWHERE
    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

    Now that I've been running with the EGR disconnected for a while (no codes,better pick-up,definite improvement on torque,better fuel consumption,no crap into inlet manifold).I'm now thinking of trying the tuning box to see what improvement it has had on that side of things.

    Even now it would be interesting to see the torque curve on a RR printout.

    Must be careful of too high EGTs though apparently.Our American cousins are obsessed with EGTs on their tuned diesels,they have EGT probes and guages to measure it.

Page 1 of 13 12311 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. canbus disconnection
    By Al 22 dti in forum Vectra C / Signum Car Chat
    Replies: 6
    Last Post: 23rd March 2011, 08:28
  2. Battery disconnection - Help please!!
    By jujitsuboy69 in forum Electrical & ICE (including SatNav)
    Replies: 9
    Last Post: 1st June 2009, 10:56
  3. Air box mod & battery disconnection
    By vectravirg in forum Vectra C / Signum Car Chat
    Replies: 20
    Last Post: 13th November 2006, 20:05

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
  •