SOLVED: Thanks you got it. It was the fuel pump relay. Swapped out to an 850 relay 103 and all is well. I don't understand the failure mode, but fail it did. Thanks for the tip.

My 2000 S70 non turbo, with 174,000 miles has a problem when the car is dead cold and the temp is below 30 deg. F. It will start fine, but as you start to accelerate it will not go over about 10 miles per hour. It feels like it has no gas, and pumping or flooring the accelerator does nothing. After ...