It just started this weekend. When I'm driving down the road all of a sudden a very violent vibration starts going throughout the entire car...I guess not violent, but very very noticable in the steering wheel, panels, floor board, and clutch pedal. If I keep driving the car it will go away, come back, go away, etc. There is no set time it will come or go, but I can't figure out why it is doing this...any ideas??

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I had a wheel weight come off once and it did what you are describing. You'd think it would have shook all the time but it was kinda random. *shrug*

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BPU'd skittle

But once mine starts shaking it will do it at a dead stop idle too.

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-Tony <--- NOT asian.
'06 Wicked White EVO IX

Does it lose power when it happens and are the balance shafts still in the motor?

97 ECLIPSE GST SOLD
13 Chrysler 200 V6

I don't know if it loses power or not because I have never been hard on the accellerator when it is happening. And no, I don't have balance shafts anymore, but that would be a constant vibration if that were the case.

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-Does it go away when you do something (depress the clutch)?
-Have you let it idle and looked under the hood (watch motor mounts, ect)?
-Where does it feel like it's orginating from on the car?

Found it. I had a wastegate leak last Thursday and it melted my A/C fan. It is all deformed and causing the vibration when the fan comes on.

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That's a new one, well at least you figured it out relatively easy, and it is not a hard fix.

'95 GSX - New motor/turbo going in...
'95 TSi AWD - For sale...buy me!
'03.5 MazdaSpeed Protege - Stock daily driver
'97 CBR 600 - Purple is a real man's color