my 2002 cav quit on me

What is your question?

she was running ok it was getting time for some minor things. but i abused her by not changing oilenough,well in feb. 2011 she needed a smog but the engine light was on.mechanic friend cleared codes told me to replace thermostat.i did and spark plugs too poured injector cleaner in tank getting her ready for the smog check. but the next day on my way to work she started running weak the next day i discovered they sold me the wrong plugs. changed them and it didnt help i got a scan tool and there were no codes in pcm.car was idling very rough and lacking power.a few days of not being able to diagnose i took her to a friend a few blocks away and coming home she quit on me.to date i have replaced plugs and wires, coils, fuel filter,crank positionand cam position sensors and still not running.HELP