lost power no acselaration

It could be caused by several different things. One common problem on these engines is the crank position sensor, it's mounted to the back of the engine, right at the bell housing. If the car starts when you push the accelerator pedal the idle switch (part of the throttle position sensor) is misaligned and needs to be adjusted. I'd suggest to take your car to a Volvo specialty store, they will know what to check on your car. Zee