what year moters and models will fit and work properly on 2003 Ford Explorer

timming chain jumped and i replaced them all 3 and know it wont start

Asked by for the 2003 Ford Explorer
here the computer is the biggest issue. now a days you have to replace with same or spend big bucks at a performance shop to change engine. as far as it not starting if it's an interference engine it may have damaged the valves and or pistons. the heads or engine may need major work