99 lumina 3.1 no spark

:banghead: The other morning going about 60mph my 99 lumina 3.1 just stumbled once and died. It has not started since. I have no spark at any of the plugs but it cranks. I have been able to rule out about 6 of the 9 things I'm told could be wrong with it. Now I need help with instructions on how to change the crankshaft position sensor. Can it be done from above?

Need Your Help! Thanks

Check this link. http://www.autozone.com/az/cds/en_us/0900823d/80/0e/d2/13/0900823d800ed213/repairInfoPages.htm