That is from my S70, but the purge valve should be in a similar location on a '96. Look for a round plastic valve attached to the radiator shroud somewhere near the battery (if you follow my line there, you will see the square one on my car at the bottom left of the picture). Sorry about the late r...

The fuel pressure is good- did the test as you suggested (thanks)at the schrader valve - so it's not the fuel filter. Think you're right about the evap canister. Was the pic you attached for a 1996 850 or another model and year? Can't seem to identify that evap system hose in my car. Also where and ...

The engine was not running when I filled up and 'topped off' so I assume the pump had turned off (no sarcasm intended, I appreciate your help), if that's what you were asking?

Does this answer change your suggestion? I have not attempted to do it yet. I'll wait for your reply.

Have 1996 Volvo 850 GLT sedan 100k+. Let it run down low on fuel, almost to the red line (first time I've done that in almost 15 yrs). Was running fine, no starting problem, new battery, engine sounds good. After I filled up with gas, car wouldn't start. Engine cranks good. Checked fuse, it's ok. Fu...