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Thread: '03 2.2 DTI Signum - Revs drop... struggles to idle... then dies... :-(

  1. #1
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    Default '03 2.2 DTI Signum - Revs drop... struggles to idle... then dies... :-(

    Following on from this thread:

    http://www.vectra-c.com/forum/showthread.php?t=58051

    and a few other threads that unfortunately seem to die off without resolution (so at least I know I'm definitely not the only one finding this)

    I would like to at least clean the Throttle Body before taking car to dealer.

    The symptoms I'm getting are exactly like what others have described when the Idle Control Valve breather hole gets blocked in petrol engines but given that I'm driving a Diesel engine, there isn't one to go wrong.

    There doesn't seem to be any pattern to it wrt to driving style (agressive/crusing), engine temperature, fuel type (supermarket vs. Shell or BP etc), idling while stationary or driving along as normal.

    ...and it's not the rubber joints on the turbo vacuum pipes kicking me into limp home mode. Already had that problem previously and thankfully sorted that quickly and without costing a fortune. It went into limp home mode in that case, this is very different, you're lucky to limp to side of road.

    Occasionally if you switch engine off and back on again it comes back immediately but more regularly now it takes maybe a dozen goes at it over maybe 2 or 3 minutes. And then sometimes after that it can run perfectly for the rest of the day.

    It's like it has dirt or water in the diesel but have already had this checked and apparently that's ok and fuel filter only had a small amount of condensation that I was told, "wouldn't be anywhere near enough to give you what you're experiencing anyway". Airflow sensor checked and reported to be fine and no cat problems.

    Also tried a dose of redex but didn't make any difference.

    Anyone any suggestions as it's becoming dangerous now when it dies while driving along and I can't get it cleared within 2 or 3 restarts while coasting.

    Really frustrating part... NO ENGINE MANAGEMENT LIGHT!!! At least if I got that sodding spanner light, I would feel justified in taking it along to try to get codes read, but at minimum if someone could point me in the direction of how 2 clean the throttle body it would be much appreciated.

  2. #2
    Regular Member Sean-2.2Direct's Avatar
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    Could it be a electrical fault mate?
    Diesels dont have Throttle bodies i have been told

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    Regular Member morbid movie's Avatar
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    Vehicle : insinia

    Trim : srinav

    Engine : 160cdti

    Year : 2011

    Mileage : 11,350

    Default

    could be blocked crank case breathers or split turbo hoses
    Last edited by morbid movie; 11th December 2008 at 13:53.

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    Ex Vec-C Admin / Founder Duncan's Avatar
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    Quote Originally Posted by Sean-2.2Direct View Post
    Diesels dont have Throttle bodies i have been told
    Afraid I can't help as you've covered a few of the common things and I'm not really au fait with diesel engines, only ever had petrol.

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    Bummer....

    I know it's not the split pipes for the turbo, already had that earlier this year so that's fine.

    Have had to parked car up for now and only take it short drives for now as can't afford to be completely stranded particularly if family are on board. It's happening too regularly to trust it.

    Any help welcome... surely there's only so much can go wrong between fuel tank and cylinder? Anyone know if it's likely to be a pump or injector problem and if there would be any way of narrowing down the area of investigation? (Please note again, no EML coming on during any of this)

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