Unusual and bothersome oscillation

[depofly]

Greetings everyone, may someone provide assistance to me? I own a 64 plate cdti insignia with a 163bhp engine. Generally, it has been functioning well, except for the current issue of an irritating vibration when driving. It seems to be a case of a loose exhaust or a loose heat shield, among other possibilities.I have rebuilt a gearbox mount that had a torn rubber bushing, but the vehicle remains same and it is frustrating. What is the cause of this vibration? Could someone provide guidance or recommendations?

[Mututing]

Is this vibration mostly rotational or does it occur while going over bumps? Have you got your exhaust system inspected to exclude it as a potential cause?

[SlayNeo]

Are you referring to brake disc dust shields?

[depofly]

The exhaust seems to be in excellent condition. The vehicle has vibrations when in motion and ceases when the accelerator pedal is not engaged, which is becoming bothersome. The vehicle has just had its MOT and received merely an advise for the gearbox mount, which has since been rectified. Is it possible that the turbo actuator valve located at the front of the engine compartment near the bonnet catch is the cause? I am reluctant to engage in a game of chance and squander money.

[Inspirli]

My 2016 model car with a 170 horsepower elite trim had this issue for almost one year. Performed two thorough inspections on all engine mounts and gearbox mounts. The garage conducted a thorough search but failed to discover any issues. However, the MOT garage acknowledged the presence of a problem but was unable to identify or provide an explanation for it.
I had the suspension, exhaust, and every other conceivable components inspected. There is no happiness or satisfaction.
One day, it abruptly ceased and never returned, hopefully avoiding any potential jinx.
I remained uncertain about the nature of the problem, to the extent that I had reached the point of having the clutch disassembled and examined.
My experience was characterised by fluctuations in acceleration and deceleration.
Best wishes. The automobile was really bothersome to the point that I considered selling it, despite my affection for it.

[depofly]

I understand your emotions. The issue is in the amount of money one spends on garage bills and new components, only to get another bill and find that the automobile remains in the same condition. This flaw, in bye bye insignia

[Bridgenix]

The issue is that if you dispose of it, you may get something else that may possess a distinct and perhaps pricier defect.
Occasionally, it is preferable to deal with a familiar and known entity, even if it may be unpleasant or undesirable.
I have been experiencing an intermittent annoyance, sometimes referred to as a "dong," that occurs only during left turns on certain road surfaces. I am aware of its presence and patiently anticipating a failure.However, I am aware that it will need a financial investment.
Furthermore, this vehicle seems to excessively wear down suspension and braking components at an alarming rate.
However, considering the significant amount already spent, it seems more cost-effective to continue with the current option.
The automobile is exquisite, and I am certain that I will not find anything like to it.

[Cleverco]

Without conducting a test drive, it is difficult for me to speculate on the exact cause of the issue. It could potentially be related to various aspects such as tracking, suspension components, mounts, or other factors. However, I experienced a similar situation with my previous vehicle, an older model J-registered Wetro GTI. Surprisingly, the problem turned out to be the front tyres, which I only discovered when I had them replaced in order to pass the MOT inspection.

[Cleverco]

Have you had any success thus far?

[Liveek]

Presumably, he would ignite it and abandon it to minimise his losses.

I believe it is the boost valve mechanism. My experience was similar - when I stopped operation, it would oscillate until I quickly pressed the throttle.