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Thread: Signum 1.9cdti 150, what low down torque?

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    Default Signum 1.9cdti 150, what low down torque?

    Hi

    Just joined this forum as Ive just bought a Signum 04 1.9cdti 150.

    The car is great, 68,000 in silver (design). I got it to replace my ageing Passat towcar but although this Signum pulls really well from 2000 rpm the torque below that is awful with a huge flat spot.

    Is this a known problem or has there been any cures?

    I should have a tdi-tuning box here tomorrow for it which I hope will help, but any advice/experience would be appreciated.

    The old Passat and my wifes Golf GT tdi (110) pull hugely better low down. I'll be towing my racecar with the Signum and that low down torque is needed!
    Thanks

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    Regular Member John-joe's Avatar
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    I got the 1.9cdti (150) same year but its an elite, had loads probs this year with it , i lost lot of power and also flat spots under 2500 rpm.
    1 Itake manifold was replaced
    2 EGR valve followed
    £ now swirl actuator has gone...........

    Does it judder at tick over or 1000 rpm ?

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    Regular Member mark1319's Avatar
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    I'm not a diesel owner so not too sure, but I think they suffer from major turbo lag. I may be entirely wrong though mate, one of the diesel boys will know better

    p.s. a nice 2.0T has no flat spots and will just pull all day

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    Juuder?

    maybe, ive only driven it 150 miles so far.

    Checked swirl valves, and were ok. Is yours better with all the new bits?

    Also had cambelt done as its done 68,000, shame was that it had already been done once!

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    Regular Member Caterman's Avatar
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    Vehicle : Signum

    Trim : Elite

    Engine : 3.2 V6

    Year : 05

    Default

    Flat spot is a common problem with the 150 CDTi engine m8. Do the airbox mod and fit a panel filter (K&N, Courtenay Sport etc.) That helps a lot but when you fit the tuning box you should notice a huge difference

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    Quote Originally Posted by mark1319 View Post

    p.s. a nice 2.0T has no flat spots and will just pull all day
    It'll pull more fuel out of the tank as well.

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    Fitted tuning box today and its made a good improvement to the car.

    No big bhp+ (but its not meant to) but has made the car more driveable, easier overtaking and has minimsed the flat spots.

    Overall

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    Default judder

    Quote Originally Posted by sigtim View Post
    Juuder?

    maybe, ive only driven it 150 miles so far.

    Checked swirl valves, and were ok. Is yours better with all the new bits?

    Also had cambelt done as its done 68,000, shame was that it had already been done once!
    Judder as in does car shake when ticking over or if you rev it to 1000 rpm ?

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