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Thread: Clutch problems V6 CDTI

  1. #1
    Regular Member chilly51967's Avatar
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    Default Clutch problems V6 CDTI

    Hi - any advice gratefully received!

    When pulling away in 1st gear; I get a 'flat spot' of acceleration (pressing accelerator down further has little affect). As a result, acceleration is pants. This is intermittant and only accelerates correctly, occasionally.

    When changing to 2nd gear and depressing the clutch, as soon as the clutch pedal goes down to the top of the bite, the car lurches forward and takes off - making a smooth gear change impossible.

    What I have found is that when the the 1st gear acceleration is flat; if I keep the clutch pedal down to the top of the bite and 'ride the clutch' a little, the car responds brilliantly - i.e. acceleration is instant and progressive. I can hit the flat spot; depress the clutch; accelerate and depress the clutch again to return to the flat spot!

    Is this a clutch issue, or is there some form of sensor problem that's fooling the ECU?

    Thanks in advance,

    Ian.

  2. #2
    Regular Member BigWilko's Avatar
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    Vehicle : Signum

    Trim : Design

    Engine : 3.0 CDTI

    Year : 2005

    Default

    Quote Originally Posted by chilly51967 View Post
    Hi - any advice gratefully received!

    When pulling away in 1st gear; I get a 'flat spot' of acceleration (pressing accelerator down further has little affect). As a result, acceleration is pants. This is intermittant and only accelerates correctly, occasionally.

    When changing to 2nd gear and depressing the clutch, as soon as the clutch pedal goes down to the top of the bite, the car lurches forward and takes off - making a smooth gear change impossible.

    What I have found is that when the the 1st gear acceleration is flat; if I keep the clutch pedal down to the top of the bite and 'ride the clutch' a little, the car responds brilliantly - i.e. acceleration is instant and progressive. I can hit the flat spot; depress the clutch; accelerate and depress the clutch again to return to the flat spot!

    Is this a clutch issue, or is there some form of sensor problem that's fooling the ECU?

    Thanks in advance,

    Ian.
    hmmmm, Don't think it sounds right, certainly not like mine. I've just gone from a 120CDTI to the V6 CDTI so everything seems fast. I was concerned that my clutch was 'funny' but as i'm driving it more it just seems that it's a 'different car' issue.

  3. #3
    Regular Member m8internet's Avatar
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    Mine suffered something very similar to this, reported it numerous times and no fault found

    On mine I would be in a high gear, then require to a low gear to overtake
    Push the gas, but get loads of revs and no increase in speed, then suddenly it would apply

    The clutch eventually gave up

    There is a Field Remedy for incorrect lubrication on clutch / gearbox
    Visit dealership and discuss

  4. #4
    Regular Member chilly51967's Avatar
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    Thanks Wilko and M8, for your replies.

    I got the car thru Evans Halshaw and it's already had one field remedy applied (ECU update) under warranty, as I was suffering issues at 1500 revs.

    That time, I had to tell them what to do to fix the issue - thanks to this forum! Funny how they can't find any fault when they're paying for it. Looks like I might have to demonstrate the issue to them.

    Thanks, again, and if anyone else has heard of something similar, then all ammunition will be useful.

  5. #5
    Regular Member m8internet's Avatar
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    Quote Originally Posted by chilly51967 View Post
    had one field remedy applied (ECU update) under warranty, as I was suffering issues at 1500 revs
    Not aware of that one, do you have the field remedy number?

    Field Remedy 1957 refers to a EMS update on completion of the fitting of the upgraded SCVs to the fuel pump, that's only one I am aware of

  6. #6
    Regular Member chilly51967's Avatar
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    1957 is the one that was applied. However; I think that the issue is returning, so it looks like they'll kop for the SCVs too. 3 month's warranty is about to expire...

  7. #7
    Regular Member m8internet's Avatar
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    Quote Originally Posted by chilly51967 View Post
    1957 is the one that was applied
    That was pointless, it should only be applied once the uprated SCV have been fitted

  8. #8
    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 m8internet View Post
    That was pointless, it should only be applied once the uprated SCV have been fitted
    Not true as the new EMS just alters the way the engine revs in neutral, which in return aids gear changes. The only thing connecting, so to speak, the SCV's and new EMS is that the new EMS has the fault code for failed SCVs...the old EMS would give UNKNOWN FAULT CODE (fuel related).

  9. #9
    Regular Member m8internet's Avatar
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    Field Remedy 1957, the EMS update is solely to be used AFTER the uprated SCVs have been fitted
    This is clearly marked on TIS
    Equally, VX have a disclaimer that in the event that only the EMS is applied that the retail outlet (ie dealership) remains liable for any subsequent repair costs

    The main benefit of the EMS update is to report on fuel errors, which the original EMS does not, ie when the SCV is partially blocked the warning light comes on, thus preventing any damage and is diagnosed quickly and early

  10. #10
    Regular Member chilly51967's Avatar
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    Thanks guys.

    I've booked it in, on the basis of the 'clutch issue', but I'm going to update them with the revs issue again. On he basis that I told them that the revs symptoms seemed to match Field Remedy 1957 and the applied the EMS (not ECU as I said!) only, then it would seem that they (Evans Halshaw) have left themselves open to be responsible for any potential replacement of SCVs.

    At the end of the day; I've got a car that I really like (it's my first VX since my first car (a Mk 1 Astra 1.2) and they should make sure that everyting works as it's supposed to, before the warranty runs out!

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