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Thread: Unacceptable vibration/rattle @ 13,000 km

  1. #71
    Senior Member IchabodCrane's Avatar
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    Ha.. No. This is my second Mirage as well so I know what it should sound like.


    Will weld for beer.

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        click to view fuel log View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)


  2. #72
    Senior Member IchabodCrane's Avatar
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    Just returned from dealership.
    The buzz/rattle appears to be gone for the moment and the door squeak as well. Fingers crossed.
    Door issue is the limit strap mount inside the door. I was told they lubed it. I'm assuming I'll have to do this once in a while.
    The Buzz I'm told was the serpentine belt. Really?..
    That's what I'm told. They adjusted it and all's well. We'll see.
    Will weld for beer.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)


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    Eggman (10-05-2017)

  4. #73
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    Garage empty: add car
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    How's your car been, all fixed now?

  5. #74
    Senior Member IchabodCrane's Avatar
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    The high note buzz/rattle may indeed have been caused by serpentine belt as it has not returned after belt was adjusted. The door rattle remains quiet.
    Now I'm back where I started.. the low note reverberation/rattle is still there very noticeably under slight load @ 2000-2100rpm especiallywith cruise on.
    I believe now that the low note "noise" may also be related to the serpentine belt so I'm looking to buy a higher quality aftermarket and changing it out to see.
    As is now I can at least live with it.
    Will weld for beer.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)


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    Fummins (10-17-2017)

  7. #75
    Senior Member Ares's Avatar
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    Quote Originally Posted by IchabodCrane View Post
    Hey all..
    My 17 Mirage CVT has slowly worked a new bit into it's repertoire. There is now a very distinct low note resonance/droning vibration that can be heard and felt through the seats and steering.
    In certain conditions.. while driving at any speed/w RPM between 1800 and 2100 while accelerating (as when cruise is adding power slowly) the rattle starts and will continue until engine load eases or rpm moves out of this zone.
    I've been to dealer and took service tech out for a drive but no resolution in the works. Dealer has fixated on the exhaust resonance issue which Mitsu is aware of while ignoring the vibration and rattle I'm concerned about.
    Oh well.. here we go again. 3 or 4 months of forcing dealer to properly diagnose and fix issue while I have to drive "the rattler" and put up with it.

    I'm not reading through the pages on here, but this happens on my manual albeit different rpm range.
    I'll check again, but IIRC 2100-3500ish rpm.
    The engine makes a nasty vibrating sound.
    Just like you mention, there's nothing under or over those rpms I listed.

    Someone else on here (Alex I believe) also confirmed this.

  8. #76
    Senior Member IchabodCrane's Avatar
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    There is a zone where load+rpm cause the engine to really growl and I consider this to be a normal characteristic of this engine.. My complaint is a low note reverberation/vibration I can hear and feel when the engine is in this zone that is caused by it but it's not the engine itself. The feeling resembles a far weaker version of the buffeting felt when windows are opened at speed.
    It's irritating for sure but it's the only real issue I have with the car and I'm hoping it's something I can find and fix.
    Thanks for everyone's input so far. It's been helpful.
    Will weld for beer.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)


  9. #77
    Senior Member Ares's Avatar
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    Looking at the dyno below, the rattling happens around the dip in HP.
    Interesting....

    Name:  Screenshot_2017-10-17-10-23-46.jpg
Views: 105
Size:  86.7 KB

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    IchabodCrane (10-18-2017)

  11. #78
    Senior Member IchabodCrane's Avatar
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    That is interesting Mitsusport.
    This is where the CVT aggressively holds rpm.
    Maybe that's why it shudders grumbles so much at cruise.
    Will weld for beer.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)


  12. #79
    Senior Member IchabodCrane's Avatar
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    Finally got audio recording good enough to hear the issue.
    I dunno how to post audio here so here's a link to hear it on Google Drive.
    https://drive.google.com/file/d/1kl-...w?usp=drivesdk
    Will weld for beer.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)


  13. #80
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    Quote Originally Posted by Ares View Post
    Looking at the dyno below, the rattling happens around the dip in HP.
    Interesting....

    Name:  Screenshot_2017-10-17-10-23-46.jpg
Views: 105
Size:  86.7 KB
    Am I seeing that right? Puts down over 100hp what???



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