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Author Topic: Bad Vibrations  (Read 6414 times)

Phil Mcavity

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Bad Vibrations
« on: May 30, 2009, 07:58:10 pm »
I now have a problem.

Cars all finished, wheels all done. Been down the motorway today and found out something major is wrong.
I am now getting bad cabin vibration under acceleration, when i ease off the gas it cruises fine, but as soon as you hit the gas hard, it shakes bad ,seems to be from 60mph onwards. Not noticable around town trotting around.

I did buy an alloy from a well known member on here that was refurbed if people remember, now what im thinking would a badly buckled alloy prior to being seen by me, could possibly give me this problem.

i get no shaking under braking or wheel wobble at a steady speed , just under accelation.

Need to get this sorted before nxt weekend :sad:

cheers for any pointers you can give me on this.

Steve
« Last Edit: May 30, 2009, 08:08:51 pm by Phil Mcavity »
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Offline scarpicus

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Re: Bad Vibrations
« Reply #1 on: May 30, 2009, 08:06:11 pm »
Had the same problem after i had my wheels done and put them back on the car....solved by having wheels balanced
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Phil Mcavity

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Re: Bad Vibrations
« Reply #2 on: May 30, 2009, 08:08:22 pm »
Under acceleration its bad, but when i hold the cars speed its smooth as, and the same under braking, wheels smooth and doesnt wiggle in the hand if you know what i mean.
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Offline SteveP

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Re: Bad Vibrations
« Reply #3 on: May 30, 2009, 08:10:09 pm »
^^ Based on that it doesn't sound like the wheel balancing.

Have you recheck your wheel nuts are properly tightened ???
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Offline pazz

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Re: Bad Vibrations
« Reply #4 on: May 30, 2009, 08:13:57 pm »
Quote from: Phil Mcavity on May 30, 2009, 08:08:22 pm
Under acceleration its bad, but when i hold the cars speed its smooth as, and the same under braking, wheels smooth and doesnt wiggle in the hand if you know what i mean.

Steve, just to clarify it doesnt wiggle in the hand under acceleration either?

I'd expect to hear a knocking if wheel nuts were loose.
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Offline 182_blue

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Re: Bad Vibrations
« Reply #5 on: May 30, 2009, 08:18:36 pm »
out of balance imo
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Phil Mcavity

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Re: Bad Vibrations
« Reply #6 on: May 30, 2009, 08:25:12 pm »
Pazz, the wheel only vibrates along with the cabin in the front ONLY under hard accelaration.

One other Note car seems to have more Tyre Rumble then before, and tyres are in the same place on the car since the wheel colour changes.
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Phil Mcavity

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Re: Bad Vibrations
« Reply #7 on: May 30, 2009, 08:34:50 pm »
ive checked the wheel nuts, all are tight.
One thing i did notice is on the fronts, i have 12 weights on one side in various sizes, and the other has 7 again in different sizes???

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Offline SteveP

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Re: Bad Vibrations
« Reply #8 on: May 30, 2009, 08:36:07 pm »
Where they rebalanced after being painted??
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Offline Greeners

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Re: Bad Vibrations
« Reply #9 on: May 30, 2009, 08:37:08 pm »
Try swapping front to rears and see if there's any difference!
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Offline Rich

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Re: Bad Vibrations
« Reply #10 on: May 30, 2009, 08:40:14 pm »
Steve,


I had a similar problem,


All it was is the nuts/bolts were lose  ( scary to think )


It made a thuddering noise when driving.


Hope you get it fixed pal :happy2:


Just read your previous posts - rushing to think i had the answer, i wrote the above.


I definately would have the wheels balanced... i also had a problem when i got new wheels on my old Golf... when travelling at over 60mph.. the steering wheel would shudder hard.

« Last Edit: May 30, 2009, 08:42:39 pm by Rich »
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Offline pazz

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Re: Bad Vibrations
« Reply #11 on: May 30, 2009, 08:40:37 pm »
Then I think best to see about getting them balanced. Did they maybe take the weights off to colour code???  :surprised:

Either way most wheels shops dont charge alot to get two wheels balanced. Just unusual for them to just "go out of balance" (if thats the problem).
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Offline Boothy

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Re: Bad Vibrations
« Reply #12 on: May 30, 2009, 08:49:32 pm »
I've had this problem twice on two different cars. The first time it was a dodgy wheel but the second time it was due to a misfire under load, exactly as your describing. I'm not sure but it seems you have just had your wheels done so it stands to reason if it does it now and didn't before then its very likely to be the wheels.

On the other hand it may not so just in case this is what happened to mine (not a golf though). When I drove normally and steady it was fine, not a judder. However when I gave it some gas it used to judder like hell. My mechanic friend said it felt like a misfire and after checking the distributor, plugs and HT leads it eventually got traced to the MAF which I seem to remember was the mass air flow meter and a faulty HT lead that had broken down inside the casing.

Hope this helps if it ain't the wheel mate.
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Phil Mcavity

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Re: Bad Vibrations
« Reply #13 on: May 30, 2009, 09:02:30 pm »
Could this be a coil pack breaking down, i know the weights were removed. the wheels were then sprayed, tyres put back on and Brand new weights were fitted by superTracker which are a well established wheel setting specialist.

Balancing normally would get a wheel wobble on the steering even traveling at a constant speed.

Never had a coil pack go, must admit, does seem simular to slight misfire and makes the car like its "shivering" being a way of describing it.

What to do!!, who to take the car too, Vw for a diagnostic, or Supertracker??? .im sure its not a buckled alloy.

If the alloy was buckled im sure id get a constant vibration on the car whilst travelling.(like being on a push bike with a buckled wheel) oh those good old days.!!

Electronic misfire,under hard accelaration, cant rule that out. Power seems to be there but id say not a crisp as it has been.
« Last Edit: May 30, 2009, 09:12:10 pm by Phil Mcavity »
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Offline Boothy

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Re: Bad Vibrations
« Reply #14 on: May 30, 2009, 09:15:55 pm »
I'm afraid I'm not very mechanically minded unless its something i've already had experience with and I've only had my Golf three weeks. If its a misfire then there are loads of bits it could be but If I've read previous posts correctly then it could be a coil pack? I took my car to Well Lane Turbo Centre near where I live and they basically put it on the rolling road whilst it was linked up to the diagnostic machine. It didn't take him  long to narrow it down and eventually find what was causing it. I don't know how the VW diagnostic works but if it only does it under load maybe the rolling road option would be best?
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