car wont start

What is your question?

Replaced fuel pump and filter,cleaned injectors and installed new o rings. Car suddenly died before i did this. Plenty of gas pressure good spark car won't start. Could it be the crankshaft position sensor? The car was loosing power and when i came to a stop would rattle and almost stall until i pressed on gas peddle. Was having hard time strarting before fuel pump went bad. Any suggestions? Any place rent OBDs? Thanks