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Power loss, poss boost problem?

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by hodgy0_2, Jul 9, 2009.

  1. hodgy0_2
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    hodgy0_2 Member

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    [Jul 9, 2009]
    Hi guys

    first post so bare with me!

    I have a 2.5TDI quattro (see pics)

    in the main, very pleased with it

    but it seems to really lose all power, only sometimes though, at first i just though i was catching it "off boost", or some sort of niggle with the tiptronic system -- but its not that, its almost like the turbo suddenly vents to air, with my foot flat on the floor, nothing (the rev needle sits at 3k) as I let my foot off, the urge comes back

    other than that it drives superbly -- any ideas

    thnks - hodgy






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    #1
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  3. arthurfuxake
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    arthurfuxake Controversial & Contradictive

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    [Jul 9, 2009]
    I'd get it checked on Vag-com for any error codes, sounds like a stuck egr valve. All error codes are stored, so befriend someone on here with vag-com.
    #2
  4. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Jul 9, 2009]
    :sign_welcome:

    I agree with arthur, get the codes scanned, similar symptoms on mine pointed to the MAF.
    #3
  5. hodgy0_2
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    hodgy0_2 Member

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    [Jul 10, 2009]
    cool thanks guys

    so next question is - does anyone know a Vagcom guy in the Cambridge area, maybe a mobile guy


    and what does the "check" button do on the dashboard, will that not show the codes

    Cheers
    #4
  6. technics100
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    technics100 Member

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    [Jul 10, 2009]
    Check button will not show codes. Someone should be able to help you or else you can buy a lead from ebay for £15 and download a shareware version of the software to read codes..
    #5
  7. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Jul 10, 2009]
    The "Check" button just performs a self test on things light bulbs and fluid levels.
    #6
  8. hodgy0_2
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    hodgy0_2 Member

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    [Jul 10, 2009]

    have you link to the shareware version, and is the lead a standard ODB11 one

    do halfrauds do these leads?
    #7
  9. hodgy0_2
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    hodgy0_2 Member

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    [Jul 11, 2009]
    ok apologies I,ve got the shareware

    but in the meantime took it to my local garage who put it on a "vagcom" type thingy

    the codes are 00542 shock sensor nozzle needle g-80 -----

    00575 Manifold absolute pressure control limit exceeded - intermittent

    01375 Engine mounting valve step -----

    17978 - Engine ECU Blocked P1570

    all the codes cleared apart the first one

    I am thinking that the 00575 one could mean its overboosting, hence the feeling of no boost as it just shuts the turbo off

    any thoughts
    #8

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