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Thread: 3.0v6 shakey/hesitation under acceleration

  1. #1
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    Default 3.0v6 shakey/hesitation under acceleration

    As above, 3.0v6 shakey/hesitation under acceleration.

    particularly over 2000rpm, when i floor the car there is no power and the engine shakes severely. if i tickle the throttle gently i can have continuous gradual power.

    if i continue to let the engine shudder repeatedly it goes in to limp mode.

    appears to be some link between the turbo lag and the problem. the problem doesn't appear in the first few seconds from boost.

    in my initial check all hoses seem okay, any thoughts on what it could be?

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    on further inspection I'm getting a quiet rattly noise on the lower passengers side of the engine, possibly elsewhere as its hard to identify properly where its coming from, and engine code P0093-52 which im dissapointed to find from searches points towards the SCV.

    RAAAAAAAAAAAAAAAAAAAA

    I have been saying to the wife for a few months now that a occasional vibration on idle had let me to believe problems may be in the future...... seems I was not wrong.



  3. #3
    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

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    Scv I'd be saying.
    What's fuel pressure like?

  4. #4
    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

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    Scv I'd be saying.
    What's fuel pressure like?

  5. #5
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    can that be checked with a OPCOM?

    if so ill check it tomorrow and report back

  6. #6
    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

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    Yeah. Need to the damand an supplied to see what their reading

  7. #7
    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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    Sounds like it is a fuelling issue. What about the fuel filter? When was that last replaced?

  8. #8
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    ages ago.

    Is it worth me changing the fuel filter before taking to the dealer. Its come on with the problem suddenly without warning. Like something has just gone, not a gradual decline like I would expect a fuel filter problem to be like.

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    ...

    Field Remedy: 1957
    Subject: Engine Y30DT, High Pressure Pump - Lack of power during acceleration
    Models: Engines: Option:
    Vectra-C 2003...2007,Signum 2003...2007 Y30DT| Z30DT,Y30DT| Z30DT
    Complaint: Engine lack of power during acceleration. During investigation with TECH2 a pressure drop between actual rail pressure and desired rail pressure is visible.
    Cause: Blocked suction control valve (SCV) within the high pressure pump.
    Production: Modified production process (earlier changing of manufacturing tools, improved cleanliness) implemented at supplier. Countermeasures were implemented with engine number 69692 (01.09.2006).


    Remedy:
    Before carrying out Technical Service Bulletin 1957 update ECU with modified software as of TIS 2000-DVD, version 76 (a modified software regarding high pressure diagnosis was implemented, improved DTC: P0093 detection).
    If the DTC still occurs refer to the following snapshots in datalist 2 "NOK I". The snapshot shows an increased fuel flow restriction within the fuel feed circuit.
    1: desired fuel pressure 2: actuel fuel pressure
    We recommend to disconnect the fuel lines from the tank to the filter, blow them by compressed air (in disconnected condition) and finally to replace the fuel filter assembly.


    The snapshot in datalist 2 "NOK II" shows a constant drop of actual fuel pressure and identified the suction control valves (SCV) failure.
    1: desired fuel pressure 2: actuel fuel pressure


    In case of an identified suction control valves (SCV) failure replace both suction control valves (SCV) of the high pressure pump as discribed below.
    Important: - During the complete procedure it is obligated to work in a clean environment. - Prevent contamination at SCV area. Small contaminations, which cannot be seen by eye, can cause major problems on engine performance. Particle size of 0,3 mm, can be already critical! - Do not use gloves. - Do not use SCV in case it has been dropped. - Make sure that pressure in the system is released before loosening the pressure connection pipe between pump and rail. - Disconnect battery after failure checking procedure. Wait for a few minutes before starting SCV replacement procedure in order to prevent any system action.
    Working Procedure:

    1. Remove high pressure pump
    - see working procedure "Replace high pressure pump", group "J", Service-Instruction Vectra-C/Signum. (Document-Number 01201498)
    2. Seal junctions of high pressure pump (Picture I)
    - attach plastic cap (5) to high pressure junction - attach 2x paper collar (3) with 4x seal ring (1, 4) and cap nuts (2) to fuel feed junction and fuel return junction
    Note: All junctions of high pressure pump should be closed right after removing each fuel line from still installed high pressure pump.


    3. Clean high pressure pump.
    Note: Brush off all dirt and rust using wire brush. Spray off dirt and rust using parts cleaner.
    Important: The area around the suction control valves has to be cleaned very thoroughly!
    4. Loosen suction control valve (1, Picture II)
    - remove 2x screw (2)


    5. Remove suction control valve (Picture III)
    - rotate suction control valve (1) to remove it from high pressure pump
    Note: Keep work area clean and make sure no contamination gets into and around suction control valve mounting hole.


    6. Prepare new suction control valve (Picture IV)
    - apply clean engine oil to both o-rings (1) of suction control valve


    7. Insert suction control valve (Picture V)
    - push suction control valve (1) into pump housing in direction of arrow using both hands


    Note: Several mm clearance (1) between suction control valve flange and pump head will remain. (Picture VI)


    8. Attach suction control valve
    - Install 2x screw by hand - tighten 2x screw with tool until suction control valve flushes with high pressure pump
    Note: Tighten each bolt alternately to prevent suction control valve inclination.
    - tighten 1st screw 13 Nm - tighten 2nd screw 13 Nm - re-tighten 1st screw 13 Nm
    9. Replace 2nd suction control valve accordingly.
    10. Remove seals from junctions of high pressure pump
    - remove plastic cap from high pressure junction - remove 2x paper collar with old seal rings and cap nuts from fuel feed junction and fuel return junction
    11. Install high pressure pump
    - see working procedure "Replace high pressure pump", group "J", Service-Instruction Vectra-C/Signum. (Document-Number 01201498)
    12. Conduct performance and leakage check
    - Conduct High pressure test by following TIS 2000 steps - Checking procedure (Tech2) - Non Guided Electronic System Diagnosis - B: Functional Group Test - B-004: ACTUATOR TEST - T-008: (for Z30DT T-009) Tester Display Fuel Leakage Test
    Spare-Parts: Part-No.: Catalogue-No.:
    Kit-suction control valve 98086740 8 19 348
    Labour Times: TC: Hours:
    U3 195 70 Install Kit-suction 92 5.9 control valve
    The costs for this repair will be covered during the normal warranty. The regular warranty procedure should be used for claiming Set-up-time.
    FunctionalGroup: J - Engine
    Complaint Group: 13 - No/Poor Function,20 - Poor Performance
    Trouble Code: None

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

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default

    If the fuel filter hasn't been touched in ages I suggest you do it ASAP. Makes quite a difference It only costs a few quid

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