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Thread: Facelift V6 CDTI running rough??

  1. #1
    Regular Member v6diesel's Avatar
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    confused Facelift V6 CDTI running rough??

    I know this has been covered before, but my cas still has a slight mis-fire when cold and it only gets a bit better when warm. The car has been back to the Dealers twice. The first time they updated the software and did some reprogramming, no effect. Second time they replaced some parts, I think it was the ignition control module for two of the cylinders. This helped for a little while but its coming back and is getting harder to drive below 2k or on a trailing throttle.

    Question is, do I persist with the Dealers and insist on a test drive with a Technician, or do I follow some other route to get it traced.

    Thanks for your help...

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    Regular Member vectra 120's Avatar
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    Quote Originally Posted by v6diesel View Post
    I know this has been covered before, but my cas still has a slight mis-fire when cold and it only gets a bit better when warm. The car has been back to the Dealers twice. The first time they updated the software and did some reprogramming, no effect. Second time they replaced some parts, I think it was the ignition control module for two of the cylinders. This helped for a little while but its coming back and is getting harder to drive below 2k or on a trailing throttle.

    Question is, do I persist with the Dealers and insist on a test drive with a Technician, or do I follow some other route to get it traced.

    Thanks for your help...
    I would ask to dealer for a technician to go out on a teat drive most dealer are happy to do so.

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    Regular Member m8internet's Avatar
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    Give them one last chance, then get VX involved
    VXs first response may be to take the car to a different dealership, if so try to get a copy of all previous work carried out (even if under warranty)

    I had that happen on my Vectra B
    Three visits and they couldn't diagnose a grinding sound
    One visit to another dealership and they diagnosed it within 15 minutes, as the handbrake shoes had failed within the rear disc housing
    Back to the first dealership and they fixed it for free (cost them £380)

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