History of the problem

Just one day, my 2004 Freestar was steaming and some rusty water was coming out from the exhaust. After this it couldn't start anymore.
Trying to scan the PCM was heating up and could not communicate
Not long, the engine stiffened up and refusing to turn. Engine was opened from top and it was discovered there was much water inside. How the water got in there could not be explained
This was done and it got started. Then stopped while steaming and got stiff again. Engine was then opened down to the metal bearing.

On installations back, it could no longer start. I was told it was bad PCM

Current problem

Cannot successfully program any PCM to start it.
Is there something wrong with timing?
Is there something wrong with CKP (Crankshaft position sensor)?
What is the way forward?

 

You are all over place with your descriptions and you need to fix the worst problem first. It's not the PCM causing all your heartache.

Are you able to turn the engine using a socket and breaker bar on the crankshaft nut?? If coolant filled a cylinder from a blown headgasket, the engine is hydrolocked. If that's the case, there's no need to do anything else until you fix the problem with water getting into the combustion chamber.

 

Thanks so much sir for your quick response.
​​​​​​​Yes that has been sorted already. Head gasket replacement done. Engine turns freely and rolling fine.