[951500]

pop the number 1 spark plug out and find your timing marks on the crankshaft , stick a long Clean screw driver or something in the sparkplug hole and Turn it over MANUALY with a Good size ratchet and socket and wait and feel for the piston to come to the complete top and than look at your timing marks and see where the timing is. and that will tell you if it jump timing.

Note - thats just a faster way of checking it , it could be something totaly different but its worth a shot.