And that plug looks fine.

If all else fails, you might try switching to a colder spark plug. I had the same problem/symptoms at WOT until I switched to a colder plug, based on the advice of my tuner. Now my 850 is far from stock, so we're sort of comparing apples and oranges, but switching to the colder plug cured the spark ...

Found a new replacement CHRA for -$100, so that looks to be the best solution for now.
But the 16T etc would be a hoot !

Thanks again vtl !

Will any 14T work ?
And last question (I hope) - any recommendations for tuning other than IPD ? I used VAST for my 850, but he doesn't do ME7. And I've heard varying opinions about Hilton.

That makes sense. So do you know if any 14T TDO4L from the early '00's work, or are there variants between models ?
And if a tune is going to be needed, is there a preferred upgrade from the 14T instead of the 13T ?

Thanks for your input on this !

Thanks vtl. I thought that we might be moving in the other direction, that is that the 13T would be smaller and be making less boost than the 14T. So will the 13T work, just not to its full potential without a tune, or will it over boost and possibly hurt the engine ?

And thanks Neil. Now I'm ...

So we're working on my sons '03 V70XC which had a coolant leak from one of the coolant plugs on the 14T turbo. We were just going to tap and plug the port, but when we removed the turbo, we found a lot of axial play, so it looks to be a lost cause.

Now we have a 13T in good shape out of a '02 V70XC ...

Too funny !
I can't imagine a manufacturer doing that these days.

I would not do that. The dye will get everywhere you don't want. You'd have better luck cleaning and lightening the existing cement.
Maybe try a little muriatic acid on some inconspicuous place.

Must be, but check the bolt pattern to verify.
https://www.matthewsvolvosite.com/easy- ... ming-belt/