Control problem during hard acceleration
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Thread: Control problem during hard acceleration

  1. #1
    FRESHMAN ROVER Frostbite's Avatar
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    Control problem during hard acceleration

    Hello Folks,

    I recently bought a 2009 4.2L Supercharged. During hard acceleration on the highway it darts a bit from left to right and requires careful steering input to keep it going in a straight line.

    It feels like a front wheel drive vehicle hunting for traction in slippery conditions, but I'm on dry pavement.

    I'm guessing this is due to some worn out parts. Is this a common issue?

    Thanks

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  3. #2
    JACK'S GRANDAD leftlanetruckin's Avatar
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    Re: Control problem during hard acceleration

    No it isnt normal.
    Nobody here can tell you whats wrong without seeing it.
    Check all the bushings in the suspension and steering and go from there.
    Add your location as is written in the forum guidelines.
    '98 P38 HSE, with 385hp/385ft lbs of LSx under the hood. Fully functional HVAC, EAS, etc.
    '11 L322 SC
    '04 DiscoII - wheeling rig
    '02 P38, '79 924 for the kids.
    Custom fabrication, engine rebuilds and knowledge that comes from experience and not Google, always available for a reasonable cost.

  4. #3
    FRESHMAN ROVER Frostbite's Avatar
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    Re: Control problem during hard acceleration

    Crap, I was hoping it was a common wear item in the front end. Time to start poking around I guess. Thanks Leftlanetruckin.
    Whatever it takes.

    2009 Range Rover Sport 4.2L Supercharged

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  6. #4
    JUNIOR ROVER garrycol's Avatar
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    Re: Control problem during hard acceleration

    Does the DSC light come on when this happens? My thinking is that maybe it is the DSC kicking in to correct some sort of lateral movement caused by - pick an item? low pressure tyre, worn suspension, binding brakes, different brands/types tyres - could be any number of issues.

    Try turning DSC off and see if it still happens - dont boot it too much though as DSC will just switch itself back on.

    garry
    Range Rover Sport
    2.7 TDV6

  7. #5
    FRESHMAN ROVER Frostbite's Avatar
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    Re: Control problem during hard acceleration

    Hi Garry, the DSC light doesn't come on. The tires all match, and I checked the pressure a few times since my tire pressure light is on, but I assume that's due to faulty sensors as the pressures are fine. I installed new tires and the issue continued. The air suspension seems fine as do the brakes. I'll check the steering linkage and control arms. Everything feels nice and tight but maybe something moves a bit under full power.
    Whatever it takes.

    2009 Range Rover Sport 4.2L Supercharged

  8. #6
    JACK'S GRANDAD leftlanetruckin's Avatar
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    Re: Control problem during hard acceleration

    Easiest way to check everything is to have someone inside turning the steering wheel left and right while you're underneath feeling for any play
    '98 P38 HSE, with 385hp/385ft lbs of LSx under the hood. Fully functional HVAC, EAS, etc.
    '11 L322 SC
    '04 DiscoII - wheeling rig
    '02 P38, '79 924 for the kids.
    Custom fabrication, engine rebuilds and knowledge that comes from experience and not Google, always available for a reasonable cost.

  9. #7
    FRESHMAN ROVER Frostbite's Avatar
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    Re: Control problem during hard acceleration

    Quote Originally Posted by leftlanetruckin View Post
    Easiest way to check everything is to have someone inside turning the steering wheel left and right while you're underneath feeling for any play
    Right on, Thanks!
    Whatever it takes.

    2009 Range Rover Sport 4.2L Supercharged

  10. #8
    FRESHMAN ROVER Frostbite's Avatar
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    Re: Control problem during hard acceleration

    Just had the roof wrapped. Control problem during hard acceleration-rf2.jpgControl problem during hard acceleration-rf3.jpgControl problem during hard acceleration-rf4.jpg
    Whatever it takes.

    2009 Range Rover Sport 4.2L Supercharged

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