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Unknown Vibration Feeling...

The engine vibrates in drive or reverse, But not in park or neutral. and when I get to second gear the vibration goes and drives beautiful... But when I turn the air condition it get worse and you feel it more... It only vibrate when coming to a stop or slow turns, but goes away when in speed... I have replace all engine mounts and most of rubbers & bushes and check the tension belt. all Good. It feels like it's from internal of engine then external... Please Help Thanks

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  • Sydney Best
    Sydney Best Nov 20, 2014

    It's a Toyota Estima 2000 Model ACR30 2AZ-FE Engine.

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Hi, I would try electrical fault. Try this, If you have engine running and handbrake fully on, and foot brake on, put it in drive and accelerate. If engine is rough or vibrating it could be spark plug, leads or coil pack. Under load any one of these will fail and cause a rumble (vibration) in the engine, when the engine has come off load it will run fine. You could also try putting your foot hard down on the pedal from stop position as if you were trying to do a burn out. It will give you the same result as handbrake test. That could be your problem as you mentioned that when aircon is turned on it does it (which is putting load on engine), but as far as slowing down to corner??????.

Posted on Nov 20, 2014

  • Sydney Best
    Sydney Best Nov 20, 2014

    Thanks Thomas, I have check & replace Spark Plugs and Coil packs, But this engine doesn't have leads... Still vibration is there...

  • Sydney Best
    Sydney Best Nov 20, 2014

    Also checked, No mis fire...

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Not a lot of info there. What kind of car is it ? But it sounds like you have loose or missing bolts on ac mounting bracket or other place on belt. If you take a long stick and put one end on the ac ,alt,water pump ect .... Put the other end of stick up to your ear (put thumb between stick and head ) be very careful not to get stick in belts or belt . You can tell where the MN oise is coming from .

Posted on Nov 20, 2014

  • Sydney Best
    Sydney Best Nov 20, 2014

    It's a Toyota Estima 2000 Model ACR30 2AZ-FE Engine. I have tried that and even taken off the tension belt to narrow down the issue, but nothing was found...

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  • 162 Answers

That a very tricky one , it hard to tell , it better for some to hear it , get more than one opinion

Posted on Nov 20, 2014

Testimonial: "Someone did say, it could be a balance shaft issue..."

  • Sydney Best
    Sydney Best Nov 20, 2014

    "Someone did say, it could be a balance shaft issue..."

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