it cranks but wont start

It could be so many things its impossible to say without being able to diagnostic tests. If it is a 4 cylinder recheck the timing belt marks to ensure it is properly aligned, check the compression to ensure it is even , check the spark plug wires are on in the right order, check for fuel at the fuel rail. Same instructions for the 6 cylinder but that has a chain drive instead of a timing belt. Have you a good workshop manual? There is 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 Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. and get an online repair manual subscription. There is 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