Most likely the 1,000,000,000 time this has been around and I will be searching. Just combining a search with the hopes of some quick help. My son has a 1995 Intrepid 120,000 miles on a 3.3L. Won't start. He fired it off this past weekend, ran for around 10 minutes and died. Tried cleaning plugs and dring the cylinders to no avail. Bought a fuel pressure tester and it has 49psi KOEO and 60 while cranking. Cleared the computer hoped it might work. Only get codes 12 and 55. Has spark. ?????? Thinking maybe cam sensor, crank sensor or timing chain. Any help will be appreciated. What are the specific tests for each short of pay and pray buying new sensors?