Sokda Octavia vibration at speed

burly

Hi all,



I am in the process of trying to solve an issue with my 2011 2.0 TDi 140BHP Skoda Octavia.


Above 110 kph, there is a vibration flet in the car, front and rear passengers, not so much through the steering wheel. It's not a shuddering or a shaking, but a noticeable vibration at the same time. Rear passenger first reported feeling it.

• Front tyres are brand new.
• Rear tyres are about 6 years old but hardly worn at all, plenty of thread left.
• 4-wheel tracking done.
• 4-wheel balancing done.

Problems still [persists.



My next move is to replace the rear tyres, even though the guys in the tyre shop checked them out when balancing the rear wheels, and said there was no noticeable deformities.


Amy other suggestions?



Thanks.

Cona

Sounds very much like a wheel balancing issue. Depending on where you got the tyres done, some places are chancers and just cant balance and track correctly. Had a similar issue before.

Toyotafanboi

I'd agree you get a lot of lads who couldn't diagnose a puncture, never mind mind balance a wheel in some of these places.

This reminds me of a customers car we seen recently complaint of a mild juddering feeling at motorway speed, but not through the steering wheel it, was a 1.6 diesel Passat.

Anyway, long story short, injectors were tested and he had one injector out of tolerance, but no EML etc, the car was misfiring high in the rev range but you couldn't feel it at idle etc and it created a very slight vibration/ unevenness felt throughout the whole car but only from around 80+ km/h.

novarock

My old car was juddering because of the aircon motor! Its controlled by the timing belt.. Took weeks to diagnose it.

MadYaker

Did you take it to a skoda dealer for the work?

rex-x

novarock wrote: »

My old car was juddering because of the aircon motor! Its controlled by the timing belt.. Took weeks to diagnose it.

There is no such thing as an aircon pump than is run by a timing belt

Car99

burly wrote: »

Hi all,



I am in the process of trying to solve an issue with my 2011 2.0 TDi 140BHP Skoda Octavia.


Above 110 kph, there is a vibration flet in the car, front and rear passengers, not so much through the steering wheel. It's not a shuddering or a shaking, but a noticeable vibration at the same time. Rear passenger first reported feeling it.

• Front tyres are brand new.
• Rear tyres are about 6 years old but hardly worn at all, plenty of thread left.
• 4-wheel tracking done.
• 4-wheel balancing done.

Problems still [persists.



My next move is to replace the rear tyres, even though the guys in the tyre shop checked them out when balancing the rear wheels, and said there was no noticeable deformities.


Amy other suggestions?



Thanks.

Swop the 4 wheels (one at a time obviously) for the spare and take it for a drive inbetween each swop to see if the issue goes away.

novarock

rex-x wrote: »

There is no such thing as an aircon pump than is run by a timing belt

It was on my Leon, unless Seat were lying to me. They had it in for nearly three weeks, Timing belt changed out and everything.

rex-x

novarock wrote: »

It was on my Leon, unless Seat were lying to me. They had it in for nearly three weeks, Timing belt changed out and everything.

Either they were lying or you have misunderstood in some way

novarock

rex-x wrote: »

Either they were lying or you have misunderstood in some way

I brought it in as it was rocking to one side when idling and vibrating at higher speeds. First thing they did was the timing belt, most of the pulleys, and eventually someone for Seat themselves diagnosed it to be caused by the aircon system.. No hassle after that.

rex-x

novarock wrote: »

I brought it in as it was rocking to one side when idling and vibrating at higher speeds. First thing they did was the timing belt, most of the pulleys, and eventually someone for Seat themselves diagnosed it to be caused by the aircon system.. No hassle after that.

Ah thats a bit different, the timing belt and aircon system are unrelated and run totally separately. But that kind of vibration is unlikely to be what the op is feeling, that would be more an engine vibration, not a speed vibration

burly

Car99 wrote: »

Swop the 4 wheels (one at a time obviously) for the spare and take it for a drive in between each swop to see if the issue goes away.

Good suggestion, thanks. That might help to decipher if one wheel is causing the issue.

burly

Toyotafanboi wrote: »

I'd agree you get a lot of lads who couldn't diagnose a puncture, never mind mind balance a wheel in some of these places.

This reminds me of a customers car we seen recently complaint of a mild juddering feeling at motorway speed, but not through the steering wheel it, was a 1.6 diesel Passat.

Anyway, long story short, injectors were tested and he had one injector out of tolerance, but no EML etc, the car was misfiring high in the rev range but you couldn't feel it at idle etc and it created a very slight vibration/ unevenness felt throughout the whole car but only from around 80+ km/h.

Thanks for your reply, this sounds interesting. Would a faulty injector not show on a diagnostic test? I had diagnostic done recently too for a wheel sensor issue and nothing showed up? When you mentioned misfiring, that caught my eye, because I have felt recently that I am not getting the same power as I used to, it seems to be struggling above 110kph, which for a 2.0 TDi 140BHP should obviously not be happening, it should be cruising up until 150kph at least. It's regularly serviced etc, so fuel filter etc are all ok.



Is is a big job to test the injectors?

burly

Cona wrote: »

Sounds very much like a wheel balancing issue. Depending on where you got the tyres done, some places are chancers and just cant balance and track correctly. Had a similar issue before.

I got it done in FastFit Waterford and I personally witnessed the tracking being one on the screen, I insisted on it. In relation to the balancing, I saw him do it, but wouldn't know enough about it to spot if he was chancing it. I got the feeling though they were genuine enough though

Gazzmonkey

burly wrote: »

Hi all,



I am in the process of trying to solve an issue with my 2011 2.0 TDi 140BHP Skoda Octavia.


Above 110 kph, there is a vibration flet in the car, front and rear passengers, not so much through the steering wheel. It's not a shuddering or a shaking, but a noticeable vibration at the same time. Rear passenger first reported feeling it.

• Front tyres are brand new.
• Rear tyres are about 6 years old but hardly worn at all, plenty of thread left.
• 4-wheel tracking done.
• 4-wheel balancing done.

Problems still [persists.



My next move is to replace the rear tyres, even though the guys in the tyre shop checked them out when balancing the rear wheels, and said there was no noticeable deformities.


Amy other suggestions?



Thanks.

What about saw toothing? even barely worn tyres can have that problem.

I saw it on a new Kuga that was used as a demo model, test drivers would floor it to check acceleration and as a result the threads had tiny steps worn into them but the tyres looked new. Just a thought.

Toyotafanboi

burly wrote: »

Thanks for your reply, this sounds interesting. Would a faulty injector not show on a diagnostic test? I had diagnostic done recently too for a wheel sensor issue and nothing showed up? When you mentioned misfiring, that caught my eye, because I have felt recently that I am not getting the same power as I used to, it seems to be struggling above 110kph, which for a 2.0 TDi 140BHP should obviously not be happening, it should be cruising up until 150kph at least. It's regularly serviced etc, so fuel filter etc are all ok.



Is is a big job to test the injectors?

There were no electronic faults stored. It was a manual injector leak off test that showed the problem. It's not a huge job to test them, any half decent garage should be able to test them, an hours labour, ish.

Might be worth a shout if you are satisfied with the balancing and alignment etc so far.

burly

Gazzmonkey wrote: »

What about saw toothing? even barely worn tyres can have that problem.

I saw it on a new Kuga that was used as a demo model, test drivers would floor it to check acceleration and as a result the threads had tiny steps worn into them but the tyres looked new. Just a thought.

Had to google that, but could potentially be an issue on the rear tyres. Would that cause vibration though, or just noise?

burly

Toyotafanboi wrote: »

There were no electronic faults stored. It was a manual injector leak off test that showed the problem. It's not a huge job to test them, any half decent garage should be able to test them, an hours labour, ish.

Might be worth a shout if you are satisfied with the balancing and alignment etc so far.

OK, I will certainly give that consideration. Would you recommend replacing the rear tyres before that next step? They are 6 years old but to look at, they seem fine, no obvious thread wear.

Car99

burly wrote: »

OK, I will certainly give that consideration. Would you recommend replacing the rear tyres before that next step? They are 6 years old but to look at, they seem fine, no obvious thread wear.

Try anything thats free and easy first

Cona

6 years old tyres!?!?!? There very much would be thread wear I would think

burly

Cona wrote: »

6 years old tyres!?!?!? There very much would be thread wear I would think

There genuinely wasnt much tyre thread wear visible on the outside of the tyre. They are six years old, but weren't driven on for 6 years. I only got them about 3 years ago, but must have been on the shelf a while.


Anyway, I dropped the car back to place where the tracking/balancing had been done and asked to speak to the boss. I asked him to take it for a spin to see what I was experiencing which he did. When he came back, he took off the tyre, deflated them, and examined the inside, turns out there was a severed tyre wire which when the tyre was inflated, back on the car, and under load, caused a tiny bulge or 'nipple' as the guy out it, which at speed caused the tyre to bounce slightly. I got two new rear tyres and smooth sailing now.