cranks over but wont start 1997 RR 4.6 V8 HSE

Test for actual spark on spark plugs and whether or not fuel is seen or smelled on plugs after failed starting attempts. Check for blown fuses as lack of fuel or spark narrows the problem down to one or the other. However, the lack of both may point to the crank position sensor as it generates timing signals the ecm needs to operate the entire EFI system.