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Thread: Play/Vibration in Throttle Body

  1. #1
    Senior Member blinded's Avatar
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    Default Play/Vibration in Throttle Body


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    Car - KE70

    motor / part in question - 4AGE Throttle Body

    problem - Play/Vibration in Throttle Body when engine is around 3000RPM


    Hello all,

    Since I have had my 4AGTE engine I have always had a bit of play in the throttle body which leads to a loud vibrating/buzz when the car is around 2800-3000RPM. It isn't a major problem by any means, hence why it has been like that for 1.5 years, but it is something that has been in the back of my mind waiting to be asked, just that I have never bothered!

    Like I said, it is not a huge issue, but it is definitely something that I'd prefer NOT to have as it makes my car sound like it is falling apart. Especially annoying when 3000RPM is about 80KM/H in my car and I often have to sit at that speed in traffic.

    My question is, has anyone else had such an issue with this, and/or could it be possibly related to the fact that my throttle body is rotated 90 to how they are normally mounted? (Throttle wheel is horizontal)

    I know I could rotate the throttle body to see if that makes a difference, but it is a lot of work if it is not going to help. TPS wires would be too short etc.

    Just hoping somebody could shed some light into this, and what my best option is. (Rebuild throttle body/find new throttle body/rotate throttle body if that may help)

    Thanks for reading,

    -Alex
    4K > 5K > Worked 5K > 4AGE > 146RWKW 4AGTE > 210KW SR
    Alex's 4AGTE KE70
    Rest In Peace Old Faithful Corolla-Taken Too Soon 2006-2013...
    Or so was thought...
    Now with a new lease on life will be back bigger and better!

  • #2
    Veteran slide86's Avatar
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    how a throttle body makes any sort of noise is beyond me.........are you sure the noise is coming from there???

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    Veteran timbo's Avatar
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    Default

    Probably has play in the shaft, it might resonate around 3k. I'd have a look at the throttle cable linkage and see whether it has any push-pull movement or worn butterfly shaft bore. It should have a little push-pull play but nothing else.

    I could be over-reacting though!

    edit: Just re-read the OP, if you've turned it so the shaft is vertical I would say the little play it should have is cause problems. You'll probably flog it out.
    Last edited by timbo; 10th January 2013 at 09:31 PM.

  • #4
    Senior Member blinded's Avatar
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    Quote Originally Posted by slide86 View Post
    how a throttle body makes any sort of noise is beyond me.........are you sure the noise is coming from there???
    Haha yeah I am 100% certain! Definitely was a wtf moment when I realised it was from there.

    Quote Originally Posted by timbo View Post
    Probably has play in the shaft, it might resonate around 3k. I'd have a look at the throttle cable linkage and see whether it has any push-pull movement or worn butterfly shaft bore. It should have a little push-pull play but nothing else.

    I could be over-reacting though!

    edit: Just re-read the OP, if you've turned it so the shaft is vertical I would say the little play it should have is cause problems. You'll probably flog it out.
    Hmm... It definitely has push/pull play in the shaft. I never did the original mounting of the throttle body but thinking about it now, I can see how it could flog out being rotated. I'll pull my finger out on the weekend and rotate it to the "normal" position and see how it goes!

  • #5
    Senior Member blinded's Avatar
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    Reporting in for an update:

    PROBLEM SOLVERED!

    Was a bit of a mission, but I eventually spun the throttle body back to how it should be. It did involve me having to cut the flange off the plenum and rotating that 90, lengthening TPS wires, and making new throttle cable mount, but in the end it was worth it. Obviously having the throttle body rotated was the cause of the vibration

    Wishing I had done this 12 months ago though...
    4K > 5K > Worked 5K > 4AGE > 146RWKW 4AGTE > 210KW SR
    Alex's 4AGTE KE70
    Rest In Peace Old Faithful Corolla-Taken Too Soon 2006-2013...
    Or so was thought...
    Now with a new lease on life will be back bigger and better!

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