Volks AutosSky Insurance
Results 1 to 7 of 7
  1. #1
    APL TDi's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jan 2009
    Posts
    285

    What do you think this could be?

    Hi all

    I have a 2004 A3 TDi 140. Had a new turbo put on it last week. Everything seemed fine for the first week, but then it developed a stuttering under hard acceleration.

    It is fine up to 3,000 rpm but then it stutters and coughs and loses and gains power.

    What do you think this could be?

    I ahve posted a simlar question in the A3 8P section, but was hoping for some diesel expert advice.

    Cheers

    A!
    2004 140 TDi sport 3dr (new turbo)

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    APL TDi's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jan 2009
    Posts
    285
    The car seemed fine this morning, no hesitation and accelerated hard through the rev range.........

    I am now very confused
    2004 140 TDi sport 3dr (new turbo)

  4. #3
    evomaster3000's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Dec 2004
    Location
    Bristol
    Posts
    449
    MAF problem? turbo's take a while to spool up and drop power so it probabily wouldn't be the actuator or vacuum supply to it.
    could be a leaking egr? or bad egr vacuum supply/fault dumping the boost irratically.

  5. #4
    fjtwelve's Avatar
    Moderator

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Falmouth, Cornwall
    Posts
    765
    Agree MAF is a definite suspect. Next time you have the problem unplug the MAF and see if it gets worse. If it doesn't then the MAF is probably knackered. Unfortunately MAFs fail gradually sometimes, drives you mad. Stuttering is possibly due to fuel starvation or flooding, turbos and valves don't respond fast enough to cause a stutter. Maybe you cleared a blockage in the fuel lines, could be the fuel pump and its ecu playing up. VAGCOM check is a good place to start. Find an independent specialist. Where are you?
    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

  6. #5
    APL TDi's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jan 2009
    Posts
    285
    Cheers guys.

    I am taking it back to the dealer this evening and they are puttting it into audi tomorrow so they should be able to do a diag check.

    As said its fine now, so hopefully it was just something bedding in or snagging in the fuel or boost system.

    Audi are going to have a look at the turbo to make sure nothing is loose causing a boost leak, hopefully it will be fine (touch wood)

    2004 140 TDi sport 3dr (new turbo)

  7. #6
    Reverse Gear

    Status
    Offline
    Join Date
    May 2009
    Location
    scotish highlands
    Posts
    4

    Well done evomaster300

    well done, Have you fired it up yet?

    I should have done my head gasket myself but instead I thought I would get a replacement engine from a breakers. The problem is instead of a replacement AFN they've sent a AHU and won't give me a full refund as they say it's the same engine with a different exhaust gasket and turbo and all I need to do is swap my ones over.

    I have had differing opinions as to whether or not this is the case. Could you enlighten me? or direct me towards someone who could help, please.



    Cheers, Spud28
    Last edited by spud28; 1st May 2009 at 20:13.

  8. #7
    TDI

    Status
    Offline
    Join Date
    Dec 2007
    Location
    Bracknell, Berks
    Posts
    64
    Quote Originally Posted by spud28 View Post
    well done, Have you fired it up yet?

    I should have done my head gasket myself but instead I thought I would get a replacement engine from a breakers. The problem is instead of a replacement AFN they've sent a AHU and won't give me a full refund as they say it's the same engine with a different exhaust gasket and turbo and all I need to do is swap my ones over.

    I have had differing opinions as to whether or not this is the case. Could you enlighten me? or direct me towards someone who could help, please.



    Cheers, Spud28
    I don't know how this post refers to the topic but i can tell you that these two engines are completely different
    AFN is a 110BHP witn VTG turbo and AHU has only 90BHP and turbo with no variable nozzle geomerty. Also AFN got DMF while AHU not.
    Professional chiptuning (most makes and models) and diagnostics (VAG, BMW, Vauxhall).

 

 

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