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Thread: Limp Home mode

  1. #1
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    confused Limp Home mode

    Hi all (again)
    I have an 04 Signum 2.2 Diesel Auto with 80k on the clock and a new turbo last October.
    Over the last few days my car has gone in to limp home mode when I put my foot down to overtake or going uphill.
    I have also noticed grey smoke in my rear view mirror.
    When I accelerate I also notice a sound similar to that of the airvents blowing fast.

    I had a brief check for split pipes/hoses but could not find anything.

    Any advice appreciated

  2. #2
    Full Member bobssignum's Avatar
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    Vehicle : Signum 2.0 DTi

    Trim : Elegance/Elite

    Engine : 2.0DTi

    Year : 2003

    Mileage : 73350

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    By the sound of it gary you are pretty close to the problem by describeing the blowing sound , get a mate or the missus to rev the engine while you look around under the bonnet .
    likely suspects are the intercooler pipes that run from the turbo down through the intercooler and back to the manifold remember there are two right at the bottom shaped like u bends .
    Driving vauxhall,s for 30 + years
    and still loving it

  3. #3
    Regular Member mikey c's Avatar
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    or get someone to rev it while you spray it with wd40. makes those tiny splits show up alot easier!

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    Tried looking again with a friend on the pedal and me under the bonnet with some wd40 - but no luck.
    I sounds like the noise is coming from the off-side side of the engine, low down. When I rev the engine hard black smoke comes out.

    Are there any pics of the inter cooler pipes on the 2.2 diesel?

  5. #5
    Full Member bobssignum's Avatar
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    Vehicle : Signum 2.0 DTi

    Trim : Elegance/Elite

    Engine : 2.0DTi

    Year : 2003

    Mileage : 73350

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    DTI engine layout 2.jpgengine pic for you ,The two large pipes are your intercooler pipes .
    for access to the lower pipes its best to remove the front bumper .
    Driving vauxhall,s for 30 + years
    and still loving it

  6. #6
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    Thanks for the pic - the top of these pipes are ok, so I will check the forums for help on removing the bumper

    Watch this space

  7. #7
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    Hi just another question -if the intercooler pipes are damaged can I ust take them off to repair or replace? Or will it be a case of draining off anything or degassing the AC?

    Thanks again

  8. #8
    Full Member bobssignum's Avatar
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    Vehicle : Signum 2.0 DTi

    Trim : Elegance/Elite

    Engine : 2.0DTi

    Year : 2003

    Mileage : 73350

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    The intercooler pipes are essentially dry , they carry the exhaust gases from the turbo back to the manifold , the most you will find is some residual oil and some carbon based gunge
    Driving vauxhall,s for 30 + years
    and still loving it

  9. #9
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    Ok - I have now checked all pipes but nothing found. Took it to a local garage this morning after the mil light came on last night. MAF sensor is their diagnosis. So I am now £156 lighter and will fit it this afternoon.

    Watch this space.

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    OK - MAF fitted but the problem still remains - is this because I am still waiting to clear the fault codes?

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