Just swapped out pcm part numbers match eng ect.engine was starting then stalling out .tried reboot on pcm by disconecting battery and holding key to crank .now i have no crank or start. Any suggestions?

 

Welcome to the forum.

What engine, transmission?

Why the PCM swap?

Did the engine start and then shut down in a few seconds? If so, that is a security issue. The part numbers may be the same but that doesn't mean it was programmed the same, it's a computer.

Make sure the battery cables are on tight and the tranny is in P or N. What happens when you turn the key to start? There should be a relay for the starter motor in the PDC under the hood - and you should hear it click. There is also the solenoid on the starter motor itself.