loss of accelerator reponse when on Cruise control - V70 2002

Discussion in 'Volvo V70' started by Bruce Bowman, Jan 13, 2005.

  1. Bruce Bowman

    Bruce Bowman Guest

    When I have my 2002 V70 T-5 on cruise control, there is a significant
    dead spot in the accelerator response, if I wish to moderately
    accelerate to pass another vehicle.

    Volvo Techs tell me that I should use the +/- buttons on the steering
    wheel to do this - however, unless one is conditioned to do this, there
    can be an unexpected delay in the reponse. I consider this to be a
    serious safety issue, esp. if you are on a freeway, closing on a vehicle
    in front, and there is a faster vehicle approaching in the passing lane
    behind.
    Under normal circumstances, moderate pressure on the accelerator should
    be sufficient to temporarily speed up to pass the slower vehicle in
    front - However, with this cruise control problem, one could get into
    difficulties if there is an un-anticipated delay in accelerator response.

    Has anyone else experienced similar dead spots in accelerator response
    when in cruise control with theses models?
    Is this normal behaviour for these "fly-by-wire" accelerators which are
    only electronically linked to the throttle?
    My old 850 T never had this problem since it had a real throttle link to
    the accelerator.

    More importantly, does anyone know if there is a fix for this problem?

    Thanks
    Bruce
     
    Bruce Bowman, Jan 13, 2005
    #1
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  2. Bruce Bowman

    Rob Guenther Guest

    This seems normal to me... Same thing happens on our 960 and our VW Golf...
    Except with the Volvo the dead area in the pedal has almost no counteractive
    force to your foot until you hit the spot where the car is holding the gas
    pedal... The Golf I believe is a drive by wire car, and it performs the
    exact same way as your V70!... Except I don't have +/- buttons conveineintly
    on the steering wheel on either car (rocker switch on the turn signal
    stalk).
     
    Rob Guenther, Jan 13, 2005
    #2
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  3. The simplest thing to do is hit cancel, pass and hit resume.

    What is happening is that you pressing on the throttle until it reaches
    the level where the cruise is holding it. It feels to you like nothing
    is happening because you haven't gotten to the point where the cruise is
    holding it. If you floor it, you should get normal response. If you go
    beyond the point where cruise is holding it, you should get normal
    response.

    One problem that hits V70s is the throttle sticks in the off position.
    This is caused due to buildup of crud on the throttle body. This will
    also cause a dead response when you are going down hill and the throttle
    sticks. If you leave it in cruise, it will feel like uncontrolled
    acceleration when the throttle gets unstuck at the bottom of the hill.
     
    Stephen Henning, Jan 13, 2005
    #3
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