V70 2008 D5 Problems starting

[Tomsen]

Hi there

We bought an old V70 2008 D5 with a clogged DPF and starting issues.
When first driving home there wasn't any starting issues with the car other than it not having any power when accelerating as expected with a clogged DPF.

But the very next day the issue started, it started needding a couple of runs before starting.
Just thought it was a problem getting worse becuase of the DPF.

But after replacing the DPF the power was back and pulls perfect again, but starting the engine it still a problem.
There is no CEL and no error codes when scanning the car.
I've made a video of the problem in -9', but it has the same problem at 10*, but only tries once or twice before starting.
The timing belt has also been replaced, so I'm quite sure that the timing is correct.
Video

Anyone have an idea of what i should look at or check to fix this issue?