Badger5EM Tuning
Results 1 to 3 of 3
  1. #1
    Mine a manual

    Status
    Offline
    Join Date
    Sep 2006
    Posts
    29

    2.5V6 TDI Diesel timing check using Vagcom

    Hi,

    I have some performance issues with my 2001 2.5TDI Allroad - (massive engine shudder under heavy load / revs relieved by slipping clutch and 5 second idle) that has caused me to check the Diesel timing.
    I'm using the TDI timing check build into Vagcom (my release 704) and monitoring group 4 basic settings as indicated for the AKE engine.

    As soon as Vagcom fires up this setting the engine revs increase to about 825 RPM and there appears to be a diagnostic change in engine management in some sort of engine advance / retard loop. The engine seams harsh for a period advanced / early and then smooth retarded / late - I can't find documentation on this.

    The TDI plot is shown below. My engine appears to be a bit retarded - timing is ment to be 2deg ATDC +/- 2 - mine is at about 4.6 deg ATDC
    I have some questions
    1. Why does Vagcom say "please wait until injection is fully retarded"? This doesn't seam to change
    2. What are the symptoms of a 2.6v6TDI being a little retarded and out of spec - i.e. power - drivability mpg etc?

    Thanks for any input

    Adam

    http://dev.voip.co.uk/~adam/vag/2.5v6tdi_timing.gif

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    fjtwelve's Avatar
    Moderator

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Falmouth, Cornwall
    Posts
    765
    As i just said to Turkster when my timing was very slightly out and minutely adjusted it made a noticeable difference to smoother running. You say revs increase to 825rpm, mine normally ticks over at around 800-850 on the rev counter so how low is your tickover? Sorry can't help with fault code, suggest you also post this on the VAGCOM board
    2001 A6 Avant 2.5TDi quattro Sport 180hp+TurboDynamics MD438 hybrid+Bosio Race683s+3" exhaust+Celtic Tuning remap - now with adamss24 replaced with runabout
    2007 BMW 535d AM Sport + Celtic remap
    2004 A4 Avant 1.9TDi quattro Sport 130hp + Superchip - sold & replaced by
    2005 Audi TT 1.8T
    1988 Yamaha FJ1200 120hp finally traded after 23 years for
    1986 Yamaha FJ100 (1300 barrels shhh!) with too many bits to mention
    2011 BMW 320d M Sport son #1
    2004 Suzuki SV650 S son #2

  4. #3
    Mine a manual

    Status
    Offline
    Join Date
    Sep 2006
    Posts
    29
    Hi, well according to Vagcom, by normal tickover is 766 RPM. I'll post something on the vagcom board later. thanks

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO