First post… 

I have a 2005 Skoda Octavia Estate, 2.0 tdi BKD. 
during hard acceleration the whole car vibrates. Was positive it was the flywheel but I’ve also researched that it can be CV joint? I do need a cv boot on passenger side but surely that can’t be causing vibration all over the car? I can accelerate slowly up to 70 and it’s fine, but if i accelerate hard up to 70 it vibrates really bad. Sitting at 70 or any speed is perfectly fine it’s just if I put my foot down. 
Added a photo of the trusty old barge cos why not 

It's cheaper to start with a CV joint, presume you mean outer?  Straight forward to do it you're inclined & you need a new boot anyway so may as well buy a joint as well.

 

Test it first: https://itstillruns.com/test-cv-joint-7776252.html

 

Thanks for your reply, had a look at the site you suggested but unfortunately my car doesn’t make any of those noises that the site says, I’ll be getting a new boot eventually (probably the joint as well) so I’m now almost 100% certain that it’s the flywheel. 

Has the injector loom been changed  yet ?

 

it could be that - I had same issues with my  scout tdi