There are many things that can effect the loss of power shelt, Links to the Fuel pump, Air filters, derv filters, In-line fuel blockage, In-line pipes kinked, this weather, Frozen derv, Air in the system, Dirty Injectors, has it just started? when did it start? Timing, when was the car last serviced, is it turbo, (Split pipe) the ,list can go on if you can give some sort of indication how the problem started you may get the problem resolved.