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Vibration and humming sound at 90km/h - EL Futura 

 

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 Post subject: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 9:25 pm 
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I own a 98 EL Futura with 117,000km on the clock, very tidy and drives like a dream however there is one thing that has bothered me since owning the car, When I am driving at 90km/h I can hear a type of humming sound... It's hard to explain and I know it's hard interpreting sounds from words but it sounds like vvvVVVvvvVVVvvvVVVvvvVVVvvv (and so on) and I can feel a slight vibration through what seems to be the driveline as the sound occurs...

The car has done this the whole time I have owned it and the problem hasn't gotten any better or worse. Does anyone have any ideas as to what it may be?

Thank you in advance for you help,
-Shano
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 9:26 pm 
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Sounds like it could be bearing noise?

 

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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 9:40 pm 
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wheel bearings.

 

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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 9:42 pm 
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REW93N wrote:
Sounds like it could be bearing noise?


I assume your talking about wheel bearings... I recently replaced both sets of front wheel bearings and know I packed and tightened them appropriately. The sound was present before and after the wheel bearings being replaced. I appreciate your advice but I am 100% certain it's not wheel bearings...
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 9:56 pm 
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Driveshaft. Try rotating it 180 and see if the rumble persists. The hardest thing to get rid of!! :cry:
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 10:17 pm 
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creeture3 wrote:
Driveshaft. Try rotating it 180 and see if the rumble persists. The hardest thing to get rid of!! :cry:


is it a hard job to remove and refit the driveshaft?
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 10:17 pm 
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Coverter lockup?
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 10:21 pm 
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I am not familiar with converter lockup?

Last edited by Shano.T on Wed Apr 18, 2012 10:33 pm, edited 2 times in total.

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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 10:21 pm 
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I don't know an extensive amount about driveshafts but i'm wondering if the symptoms I described could be related to an out of balance driveshaft or worn Uni joints? and if so how can I tell?
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 11:46 pm 
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Does it happen all the time at that speed? As in under acceleration/coasting?

If the humming/vibrations only occurs when you are decelerating or not on the throttle, it could be the tail shaft being out of alignment.

If it happens in all situations, then it may be many things, starting from wheels to suspension. Have the wheels been balanced? Are the tyres in good wear?

 

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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Wed Apr 18, 2012 11:54 pm 
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phongus wrote:
Does it happen all the time at that speed? As in under acceleration/coasting?

If the humming/vibrations only occurs when you are decelerating or not on the throttle, it could be the tail shaft being out of alignment.

If it happens in all situations, then it may be many things, starting from wheels to suspension. Have the wheels been balanced? Are the tyres in good wear?


The sound & vibration are present while under acceleration at 90km/h. If I ease off the accelerator and let the car coast the noise goes away, likewise if I accelerate past 90km/h the sound goes away.

and yes the wheels have been balanced, I balance and rotate my wheels at work every 10,000km they have no run-out and are evenly worn. I have thoroughly checked my suspension and everything seems to be in great condition (apart from the rear sway bar link bushes which are a tad squished unevenly)
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Thu Apr 19, 2012 12:14 am 
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Shano.T wrote:
phongus wrote:
Does it happen all the time at that speed? As in under acceleration/coasting?

If the humming/vibrations only occurs when you are decelerating or not on the throttle, it could be the tail shaft being out of alignment.

If it happens in all situations, then it may be many things, starting from wheels to suspension. Have the wheels been balanced? Are the tyres in good wear?


The sound & vibration are present while under acceleration at 90km/h. If I ease off the accelerator and let the car coast the noise goes away, likewise if I accelerate past 90km/h the sound goes away.

and yes the wheels have been balanced, I balance and rotate my wheels at work every 10,000km they have no run-out and are evenly worn. I have thoroughly checked my suspension and everything seems to be in great condition (apart from the rear sway bar link bushes which are a tad squished unevenly)


I'm out of ideas

 

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EL XR6 motor, EL ECU + J3 chip, WADE 1673 Camshaft, 3" S/S intake, Pacy 4480, 2.5" Hi flow cat, 2.5" Lukey exhaust.
Max Power = 144.6 rwkw (03/05/2008)

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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Thu Apr 19, 2012 12:46 am 
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phongus wrote:
Shano.T wrote:
phongus wrote:
Does it happen all the time at that speed? As in under acceleration/coasting?

If the humming/vibrations only occurs when you are decelerating or not on the throttle, it could be the tail shaft being out of alignment.

If it happens in all situations, then it may be many things, starting from wheels to suspension. Have the wheels been balanced? Are the tyres in good wear?


The sound & vibration are present while under acceleration at 90km/h. If I ease off the accelerator and let the car coast the noise goes away, likewise if I accelerate past 90km/h the sound goes away.

and yes the wheels have been balanced, I balance and rotate my wheels at work every 10,000km they have no run-out and are evenly worn. I have thoroughly checked my suspension and everything seems to be in great condition (apart from the rear sway bar link bushes which are a tad squished unevenly)


I'm out of ideas


thanks anyway for your help mate
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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Thu Apr 19, 2012 2:43 am 
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I'm guessing the pitch of the humming increases slightly as you speed up and it only happens in 4th?

 

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 Post subject: Re: Vibration and humming sound at 90km/h - EL Futura
Posted: Thu Apr 19, 2012 10:00 am 
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I have the same noise from what you discribe.
I've done my uni joints, no fix, rotated the shaft 180, no fix, I'm left to think it's either the extention housing bush or something like the exhaust brace near the transmission hitting on the crossmember.
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