I think you have a broken Timing gear. Remove the cover on the right front side of the engine to check. Turn the engine with a crank and watch motion of the gear. It is easy to change this gear,but use the suggested manuals as a guide.
I think you have a broken timing gear. take the cover off the right front of the engine and you will probably be able to see the problem. Do not try to start the engine before checking this or you may create serious problems with your valves! The timing gear is easy to replace. Just check Les...