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Thread: Help re 3.0 V6 CDTI low-end power delivery

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    Default Help re 3.0 V6 CDTI low-end power delivery

    Greetings guys, not been on here for a few weeks but its good to be back.

    I've generally been lucky with my V6 CDTI SRI estate but just lately i've noticed that at lower revs the engine is "hesitating" a bit when trying to use the low-down torque that is usually on tap with this great engine.

    It is due an Ecoflex 50k service soon (ouch) so it could be just that but i'm wondering if anyone has had this before and if it's easily cured?

    It feels very strong and powerful as the rev rise above about 2000RPM and all the way up, and generally its very smooth (as you'd expect a V6 to be) - but between 1000-1800rpm there's a gentle, underlying but definite "stutter" in the power delivery. It still pulls well, not noticed a loss of power or anything but the stutter is spoiling the fun I get from pulling away at low speed/revs and taking the GTI's at the lights!

    Anyone got any thoughts?

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    Regular Member Ziggy's Avatar
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    Vehicle : Saab

    Trim : 9-3 Vert

    Engine : 2.0

    Year : 2000

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    Get it serviced more regularly then that :-)

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    Is it just a needs-a-service issue do you think?

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    Full Member Big Sig's Avatar
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    Does it do it at low revs in 5th or 6th? I.E. 30mph in 5th does it stutter then? If it does it could be a sticking injector. Would need a tech 2 session to monitor the fuel delivery.
    Now I need a turbo to keep up!

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    Quote Originally Posted by Big Sig View Post
    Does it do it at low revs in 5th or 6th? I.E. 30mph in 5th does it stutter then? If it does it could be a sticking injector. Would need a tech 2 session to monitor the fuel delivery.
    Is that as expensive as it sounds?

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    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    Quote Originally Posted by Zebede1976 View Post
    Is that as expensive as it sounds?
    Yes, sadly...



    Mine is the same as yours. Goes well once over 2000 but is gutless below 1800. Stutters on lower revs, and as Big Sig says it could be a sticking injector. Does yours smoke gray a lot at full throttle acceleration? Another user on here, sb1uk, has suggested that it could be sticking variable vanes on the turbo.

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    Quote Originally Posted by Celes View Post
    Yes, sadly...



    Mine is the same as yours. Goes well once over 2000 but is gutless below 1800. Stutters on lower revs, and as Big Sig says it could be a sticking injector. Does yours smoke gray a lot at full throttle acceleration? Another user on here, sb1uk, has suggested that it could be sticking variable vanes on the turbo.
    Sounds similar to mine yes, and yeah there's a fair bit of grey smoke if you really boot it hard.....just thought it did that cos of being a big diesel tho

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    Does a sticking injector need to be looked at by a main stealer? Or would an independant be able to do it cheaper?

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    Full Member Big Sig's Avatar
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    I believe Benny knows somewhere that can recon them, however new ones are £700 each or something very silly! You would need to get them all looked at on tech 2 - fuel delivery to fuel required as MTC and a couple of others have had some valves changed in the fuel pump. Not as expensive as an injector.

    Best bet is to phone around once you know whats causing it.
    Now I need a turbo to keep up!

  10. #10
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    Quote Originally Posted by Big Sig View Post
    I believe Benny knows somewhere that can recon them, however new ones are £700 each or something very silly! You would need to get them all looked at on tech 2 - fuel delivery to fuel required as MTC and a couple of others have had some valves changed in the fuel pump. Not as expensive as an injector.

    Best bet is to phone around once you know whats causing it.
    I was told Denso injectors can't be recon

    When I had it tech2'd all we could check was fuel pump pressure, which was fine...My dealer is probably using an outdated tech2 then

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