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Thread: 3.0 cdti lumpy when cold pos tunned?

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    Default 3.0 cdti lumpy when cold pos tunned?

    ok ive just brought a 3.0 cdti auto on an 07 plate which is ex police its done 90k, untill the engine is warm it seems to be a bit lumpy low down, the guy i brought it from had a couple of these cars and said that its definatly faster than the others he's had and it appears to have been tunned by the police, ( ive always heard of this but was never sure if its just rummors) when its warm its perfect, theres no smoke hot or cold, and it starts perfect too, to me it feels powerfull ( possibly more so in the tiptronic manual mode or this could be my imagination) on the motorway it sits at 70mph at about 1500rpm in 6th auto gear,
    sooo my main question is does it sound like its been tunned, or is the lumpyness a common issue on these, can it be related to tunning, i haad a 2.5 tdi vw van which people used to tune this model and it would become lumpy at cold low revs,so it got me thinking , what do you think?
    cheers

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    Regular Member m8internet's Avatar
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    It is possible to tune these engines
    However this may also be the reason why it was disposed of

    Many police forces have now dumped their 3.0 V6 CDTI
    Great performance, just not reliable enough; better cars of same spec out there now

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