Volvo Repair: stalling, definite diagnosis, o2 sensor

Question
James - I have a 1998 V90 wagon, and have been having a stalling out problem for about a month.My local shop has replaced the o2 sensor,computer, and ignition coils with no success.The car has run after these repairs but within days if not hours fails again.
Respectfully Mike

Answer
I wish I could help but without more specific information read off from the computer I wouldn't be able to direct you in the right direction.  If you have any DTC information from the shop that did the work I could be of more help.  There are too many possible causes to give any definite diagnosis.

James