Your 1998 Chrysler sebring convertible lxi v6 wont start has no spark but turns over no previous problems just didnt want to start all of a sudden?

check all the fuses, check fuel pump, check power to ignition coils

You might also check to determine whether the timing chain is broken. Have had previous experience with cranking but no ignition with the timing chain as the culprit.There are many reasons on why it might not run, There are many sensors that might be the blame for the motor not to stay running. The crank position sensor or the cam position sensor which is located on your distributor. Your distributor cap and rotor can be worn. Your O2 sensors. Your throttle position sensor. All of these are ran by your computer(ECM), and if any go bad they can cause your computer to freak out and run very poorly or not run at all. I hope this has helped any if not at all.