I just got the car last week and they had almost no power at all, for example if I would hold the gas pedal down a quarter of the way it had more power than all the way down. When I shut it off it took a lot of effort to turn back on or I would have to get a jump start to turn it back on. I thought it would be my crankshaft positioning sensor but I just got a new one from the junkyard and it's still not working. Somebody please help me this is my only source of transportation.