Adjust ignition timing. check knock sensor.
You need 91 Octane, which you can use 93 octane and 89 octane mix. which is Premium and Mid grade fuel.
Try 92 Octane.
Meaning 95 octane? Yes, no problem.
Try the higher octane gas you can find.
87 octane regular unleaded.
What could be the problem when a 2002 Volvo won't stay stared
I had to do this on my 96 850, and no, I did not have to have it running, just on accessories on ignition.
Despite that Volvo is a Swedish company the founders didn't name the car Viking or Nordic or anything like that. They decided on the Latin word volvere, meaning to roll.
One of your running lights is burned out...
mine did 200, 000 when i sold it running well
The engine is not running!
The engine is running C O C K