my wife has a 97' cobra that she dd's....it has 140k on it, when she left for work the other day she stalled it tryn to take off...the car hasnt started since then. it turns over really slow, im thinkin it jumped timing, the compression is low on all cylinders, i took a valve cover off and the timing chain is still on it, i tried changing the starter, and battery as well but same result....any ideas please......?