2000 Volvo S70 dies after warmup

My 2000 Volvo S70 non turbo starts fine when cold but dies after warming up to normal temp. It starts fine again after cooling off but does the same after warming up. No Codes from any sensors. If I force it when it tries to die, I can make it give me a misfire code. Fuel pressure at time of dyeing is still 60lb. 120lb on all cyl. Charging at 13.4dcv at time of dying. Checked timing, is on the mark. My hand held will clear codes but Laptop will not connect any of my ELM327 interfaces. I suspect the ECM is not talking to sensors. Any thoughts?