It could be so many things its hard to guess at what could be wrong without being able to do some basic diagnostic tests. You need spark fuel and mechanical integrity for an engine to start. You say you have gas, have yo disconnected the fuel line at the fuel rail cranked over the engine and verified you have fuel pressure? Do you have spark at the spark plugs when the engine is "cranked"? For tests and test procedures Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is also a company that independent auto repair shops buy their information from that the same information inexpensively to do it yourselfers. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online