Crank but no spark no run

After a total engine rebuild I found the timing was off, I corrected it. It would back fire. I rechecked the timing again. I changed it 180. Now it cranks but "has lost spark. Both cam and crank sensors have been replaced, as well as the engine computer "new" and a new coil pack. All of the wires have been checked for breaks or opens, all good. I replaced the fuel relay which also is the ASD relay. At this point it cranks but still has no spark.
After finding an article saying it is in "theft mode". It said to lock the doors then unlock with key and try. It tried to fire on one cylinder. Retried, Did a little more then nothing. It also said if I changed the engine computer it is a must that I change the body computer too "or" one will teach the other and think it has an anti-theft system which it do not have. I have not found the body computer as of yet. The Haynes book is no help.
It is getting good fuel and when I removed the plugs there was evidence that plugs have fired, but not all the time. This car is notorious for flooding, so I pulled plugs and wait before trying again. It has not tried to fire in the last dozen times tried.
The last suggestion was to check for a blockage in the return fuel line, have not got that far as of yet.
Even Chrysler has been no help. They do not even know where some of the parts are located.
s/n: 1C3XY66R6LD854220
1990 Chrysler New Yorker Fifth ave. Mark Cross Edition, 3.3L
4 wheel disk ABS
The suspension is automatic self leveling although the pump is out.
The car ran fine before an over heating problem that caused me to rebuild.