My automatic 1994 940 starts very rough--it's idling around 500, and when the engine first starts it will not accelerate above an idle speed. I can push the accelerator to the ground with no response. Sometimes leaving it in park and revving the engine gets it going, sometimes I just need to wait a couple of minutes. It's a new-to-me car, so I don't know if this is a new problem or not, but it's July, so I know it's not related to outside temperature.