Under full throttle acceleration in any gear I'm getting really bad vibration through the steering wheel and pedals. Seems to be more pronounced when probably at torque peak. If you back off from the throttle the vibration disappears and there is then no vibration at the speed I've reached so doesn't appear to be wheel balance related.

Just trying to think what it could be......

Engine mounts?

Driveshaft?

Misfire - although seems to be going well enough!

Thoughts anyone?

Is it just through the steering wheel or does the whole interior vibrate?

Does the Tsi have a DMF fitted or are they solid flywheels?

Is it just through the steering wheel or does the whole interior vibrate?

Its the whole interior. The harder the engine is trying, the worse the vibration. It feels like a wheel out of balance but if you dip the clutch and let the car coast at that speed, then there is no vibration at all.

Have you fitted an induction kit to the car banksie ?, dunno why but, a mate at work fitted recently one on his Astra and had to take it off due to the same symptoms.

Have you fitted an induction kit to the car banksie ?, dunno why but, a mate at work fitted recently one on his Astra and had to take it off due to the same symptoms.

No induction kit. It has got a sports exhaust on though. Shouldn't have a misfire/vibration through fitting that though surely. That would mean incorrect back pressure/exhaust pulses/bent turbo vanes?

Just about to go and remove the 10mm spacers that are on the front wheels to see if that has any effect, but can't see why, as wheels perfectly in balance with them fitted into 3 figures!

If it stops vibrating with the clutch in as the rpm returns to idle in it does suggest an engine or flywheel issue. If you rev it when parked does it do it or only when its under load?

Edited 10 December, 201411 yr by V6Jules

If it stops vibrating with the clutch in as the rpm returns to idle in it does suggest an engine or flywheel issue. If you rev it when parked does it do it or only when its under load?

 

I agree with Jules, sounds more like a mechanical problem with engine mounts or exhaust hangers.

Out of interest, do you get the same vibrations if you brake hard with the clutch down (engine disconnected).

If no, I would definately say its not wheel/tyre related.

My sound generator makes the entire dash rattle when in Sport/extraLOUD mode.

 

However, steering and pedal vibration under hard acceleration will more likely be caused by broken engine mounts.

Edited 10 December, 201411 yr by Orville

My money is on exhaust, engine mounts, DMF in that order

Did it start when the exhaust was fitted. If so it could be touching the body of the car when under load causing the vibration.

Did it start when the exhaust was fitted. If so it could be touching the body of the car when under load causing the vibration.

No don't think so, there is no "metallic" knocking noise. If anything it "feels" like the engine is going onto 3 cylinders, but it isn't, not by the way its going! The other way to describe it would be a bit like wheel tramping when pulling away quickly, but it cant be tramping at 5000 rpm in 3rd/4th.

I haven't been out in car again yet but the plan is to see if it does it at standstill when revved - engine mounts.

To take off the spacers and do a run without them on and see where we are. Both acceleration and braking.

Does this engine have a DMF?

Car is running well apart from this and as its only apparent when "clipping" on, and I'm not that close to my Dealer then I'm glad of these suggestions until I'm next at the Dealers.

Edited 11 December, 201411 yr by banksie

When I've broken engine mounts in the past it always resulted in a high frequency buzzing vibration through the cabin when reving and driving with a knock when applying or letting off the gas under load.

I've also had similar vibration from an exhaust that was held against the underside of the car but it wasn't as violent.

Wheel hop normally feels pretty horrible so I'd definitely want to get to the bottom of it quickly

Just been for a quick run and fiddled with all modes of sound generator - no difference.

With the car warmed up I thought I'd see if it vibrates at a stand still by just revving it. Well it won't go past 3750rpm with the throttle pressed to the floor.....safety feature or problem? I'm starting another thread on that!

Just off to take spacers off. Will report further.

Mine vibrates horribly near the redline when "making progress". Both acceleration and deceleration.

I figured it was just a certain frequency resonating the car.

Cr 2.0 150 engine.

Limited to 3750rpm with ASR( traction control) on! ASR off, no vibration with engine revving to 5000rpm stationary.

I'd say the engine mounts are probably fine then.

Limited to 3750rpm with ASR( traction control) on! ASR off, no vibration with engine revving to 5000rpm stationary.

I bet your nieghbours just love you. LOL

I bet your nieghbours just love you. LOL

My Benelli Tornado sounds better though and they like that as well!

Any error light thrown? 

 

Recently I had similar symptoms, the car threw solid EPC and flashing CEL light. 

 

It happened in the highway, tried to accelerate, nothing happen other than massive vibration throughout the whole car, steering wheel and pedal included. It corrected itself after few minutes. 

 

I had an off-duty VW mechanic scan for any error code, turns out misfire on cylinder 3 and 4, so the car was running on two cylinder when that happened

 

He thinks it might be caused by dirty fuel, the computer detected minute particles and shutdown the injector accordingly. Either that or some loose wiring. 

 

He let the car run for few minutes while his computer was plugged in to see if coil pack is playing up, didn't see any. 

 

I was worried it might be due to the deletion of the resonator, he didn't say anything about it or at least his computer didn't.

 

Car is fine ever since.  

 

Btw, at idle you won't be able to rev beyond certain rpm, it's a safety feature. 

 

Get in touch with someone with diagnostic tool to see if there's any error thrown. 

Update. Having taken the spacers off the vibration appears to have gone. Not given it the full workout yet but initially seems OK.

Spacers are 10mm ones, and therefore are not hub centric. Only thing I think I noticed when I took them off was that they weren't on the same way, but because there is no hub locating lip it shouldn't matter. There is a shamfered edge on one side where they locate over the hub and on one side this was facing the hub and on the other it was facing the wheel. There are no markings to say fit wheel this side etc. All wheel nuts were torqued on and wheels recently balanced.

Can't understand why there is no vibration at speed or braking only under acceleration, anyone any thoughts?

I think the problem might still be unrelated and just not showing itself as wheels normally vibrate more with speed but load has little effect on it

Can't understand why there is no vibration at speed or braking only under acceleration, anyone any thoughts?

It's because this is the point at which the torque from the drivetrain being fed through the hubs is at its highest, as well as the point at which the weight loading on the front suspension is at its lowest.

Non hub-centric spacers are a big no-no in my opinion, but if you must use them, the chamfer is there for a reason!

the chamfer is there for a reason!

Which is?

And which way round?

It's clearance for the hub I'm guessing.

The face of the hub will have a radius that the chamfer will allow for clearance to.