Vectra B Overrevving

Discussion in 'Vectra' started by HarrySasso, Jan 2, 2007.

  1. HarrySasso

    HarrySasso Guest

    Hi I have a X18XE1 engine Vectra B. The problem I have is from pulling
    away the acceleration is sluggish and jerky then all of a sudden it
    grabs and revs and takes off and I have to put the clutch in and let of
    the gas to control it.
    This occurs up to 15 mph after that its all fine.
    I've not got any engine management lights on and I've taken off the air
    intake and can see that the butterfly valve is not sticking.
    Any ideas?
    TIA
     
    HarrySasso, Jan 2, 2007
    #1
  2. HarrySasso

    mikeFNB Guest

    accelerator position control sensor [pot]?
    idle control valve needs cleaning?
    if fitted

    mike
     
    mikeFNB, Jan 3, 2007
    #2
  3. HarrySasso

    HarrySasso Guest

    Mike,
    Thanks for the response, what and where is the accelerator position
    control sensor please?
     
    HarrySasso, Jan 3, 2007
    #3
  4. HarrySasso

    LeakiestWink Guest

    Doesn't have one.

    Rgds
     
    LeakiestWink, Jan 3, 2007
    #4
  5. HarrySasso

    LeakiestWink Guest

    My guess would be a shagged EGR valve. Get the fault codes read,
    either with a proper fault code reader, or by using the paper
    clip method, then post the codes back here.

    Rgds, Sean
     
    LeakiestWink, Jan 3, 2007
    #5
  6. HarrySasso

    HarrySasso Guest

    Thanks, will there only be fault codes if the engine light is on or can
    they occur without the light coming on?
     
    HarrySasso, Jan 6, 2007
    #6
  7. HarrySasso

    HarrySasso Guest

    Thanks, will there only be fault codes if the engine light is on or can
    they occur without the light coming on?
     
    HarrySasso, Jan 6, 2007
    #7
  8. HarrySasso

    LeakiestWink Guest

    Fault codes can be logged without bring on any warning lights.
    When a warning light *does* come on, it usually means that a
    faulty component is actually causing a problem of enough
    magnitude, the ECU reverts the engine running into either a
    default mode (back to factory settings for learning adaptive
    ECUs) or a safe mode (sometimes called limp home mode).

    Be aware there a two different types of codes, and not all
    equipment can read all codes.

    Of the two different types of codes, there are the *generic*
    EOBD/OBD2 codes, which are the same whichever make or model of
    car generates them. These were the ones which the EU legislation
    ruled should be accessible to non-franchised servicing agents.

    The second type of codes are the more detailed manufacturer
    specific codes, which, as the term suggests, are unique to the
    manufacturer. Obviously, major manufacturers have more than one
    brand in their inventory, so GM will have Vauxhall, Opel, Holden
    & Saab, and VAG have Audi, VW, Seat, Skoda, Lamborghini, Bugatti
    & Bentley - and so you can see an Opel code will be the same as a
    Vauxhall code.

    If you do try the paperclip method to pull the codes, these will
    only be the generic EOBD/OBD2 codes, you may still need a Tech2
    test, but I have usually found the paperclip codes to be accurate
    enough on Vauxhalls. When you do pull the codes, post 'em here
    so we can help more.

    Rgds
    Sean
     
    LeakiestWink, Jan 6, 2007
    #8
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