Average new car is 55k or so. Yes, we all spend more on our old volvos than they are worth on marketplace. PPS would be my primary suspect at this point and I would much rather replace it with used oem. If you had no codes after replacing the timming belt and related items doubt the issue is there, ...

PPS-ProPartsSweden.
IMHO all 5cyl are almost the same with minor differences. Main difference might be 1vvt hub vs 2vvt system.

Pardon me, couldn't resist..
Your location makes this way easier. Just bring it to the "school for gifted" and someone from X-man will fix it.