Question about 2004 Toyota Land Cruiser

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Toyota Prado 2.7 litres - vibrating in idling when rpm goes 600

While driving the car is fine and smooth. But when stopped and still in D mode, the car starts to vibrate when the rpm reaches 600...but the vibration is not there when the rpm goes above 800.
I have replaced the sparkplugs too, but no use.

please suggest whats the issue on this will be.

Posted by on

  • muthu101 Jan 08, 2009

    I had tried cleaning the injectors, checked all sensors and all are working fine and even replaced the throttle body controls and checked.

    but, when i contacted toyota here, they say the idling cant be set in these cars as all are computerised engines and its all set automatically and one cant manually set the idling setting.

    what shall i do now?


  • muthu101 Feb 08, 2009

    Thanks for your help. But, i have even checked the diagnostic done with original toyota diagnostic machine. It shows nothing wrong in the car.

    What else could it be??


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Definitely engine mounts.

Posted on Mar 24, 2009

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Hi,
The idle setting is too low on this, causing the engine to vibrate at a resonant frequency with the cylinders. You will find that there are some speeds which cause annoying vibrations in exhaust or engine parts - even speakers or interior trim.
Setting the idle speed a little higher will prevent this. Take it for a tune-up as they can assess the CO levels and general condition of the engine, and stop this wobble.
Another thing to check is the engine mounts, as on some models these can fail, allowing the engine to move about excessively.

There may also be hidden reasons, suh as blocked injectors, faulty sensors or wear in throttle controls, but setting idle speed higher will solve the problem for you.

Thank you for using Fixya.

Posted on Jan 08, 2009

  • Richard Perkins
    Richard Perkins Feb 06, 2009

    It seems then that either a sensor is faulty or the engine mountings are worn.



    It's looking like you may have to bite the bulet and get a plug-in diagnostic to find the problem.



    Sorry this isn't a quick-fix for you.

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which engine.??? never post lacking engine ,here is why.
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