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Thread: Uncontrolled acceleration!

  1. #1
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    Exclamation Uncontrolled acceleration!

    Hi all,
    I could find anything similar hence I want to get this tread started.
    This is what my wife told me. She was returning from work yesterday, she tried to overtake a car on a hill. When she push the accelerator pedal the car hesitated but then picked up the speed and jumped forward. The pedal somehow got stuck pressed and car kept accelerating.
    In panic, she applied brakes which did not help. Then she went into button pressing frenzy and managed to get pedal released and slow down the car - she didn't use the emergency brake though - apparently she never knew. I know there is a bit of ambiguity here but this is the best I got out of her. One thing she is sure, cruise control was not on. she took the risk and drove about 2 km to home without any incident.
    The car will be towed to mechanic soon and I will update the results. But meanwhile I am looking froward to hear from anyone who experienced similar symptoms.

    its 2015 RRS SDV6 HSE - no previous faults.
    rgds

  2. #2
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    Sounds like a runaway to me, do not drive again until the oil level has been checked!
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈

  3. #3
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    A nasty experience!

    Pressing both the accelerator and the brake pedals is valid so a stuck accelerator pedal mechanism for whatever reason could be the cause. Applying the EPB is programmed to cancel the accelerator but understandably not the first option to try unless its remembered.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  4. #4
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    Quote Originally Posted by justinc View Post
    Sounds like a runaway to me, do not drive again until the oil level has been checked!
    Accumulated oil in the secondary turbo perhaps? Enough for runaway until it was all gone?
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  5. #5
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    Quote Originally Posted by justinc View Post
    Sounds like a runaway to me, do not drive again until the oil level has been checked!
    Thnx for the quick reply, so the correct term to use is "runaway"?
    Above statement immediately set me off checking the oil level and about an hour through investigation I firmly concluded that LR forgot to install an oil dipstick to my wife's car!...
    ok I figured all out after a while, apparently there is no dipstick in these engines, all digital. Based on electronics oil level is perfect. but again how can you trust a digital reading, the only way to verify is to drain and refill the oil.

  6. #6
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    I built a small module that closes the throttle butterfly on my 4.4 TDV8 for a short period when the ignition is switched off as a way to stop a runaway engine because switching off normally wont stop it. It's quite easy to fit one to a TDV6.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  7. #7
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    how about the carpet mats? sometimes the mat itself catches the pedal if the mat isnt secured to the floor of the car.

  8. #8
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    standard servicing on a Toyota is checking on placement and security of drivers floor mats,
    has its own checkbox!
    "How long since you've visited The Good Oil?"

    '93 V8 Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to '21
    '16.5 RRS SDV8
    '21 to Infinity and Beyond!


    1988 Isuzu Bus. V10 15L NA Diesel
    Home is where you park it..

    [IMG][/IMG]

  9. #9
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    Unless the d4 has aftermarket footwell deep rubber mats, and she is in the habit of holding the foot hard to the floor up a hill, then the pedal being interfered with by a mat will not be a factor... I'm still concerned for a fuelling or even a failed turbocharger allowing engine oil into the engine to be a possible cause.
    The dealer will be able to check all history of the vehicle operations, down to time of day , degree of throttle applied and even air temperature and load on the engine via their software diagnostics. Hopefully an answer is forthcoming.
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈

  10. #10
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    Quote Originally Posted by Graeme View Post
    I built a small module that closes the throttle butterfly on my 4.4 TDV8 for a short period when the ignition is switched off as a way to stop a runaway engine because switching off normally wont stop it. It's quite easy to fit one to a TDV6.
    Hi Graeme, would you tell us more about this module but dumb it down pls so ppl like me can understand what involves.

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