When i try to start my car it cranks but wont start takes about 3 tries that is weak for a few seconds than runs strong what can this be?

at slow speed and when turning to the right

The brake and tail lights work fine.

battery drain and want start up

my light wont go off so I need to pull the fuse

when going to the bank it has happened that the engine would not start , it crancks ok , just would not fire up , after a while it will start normally again , had the same problem with another car and that was the problem , where is the PCM located ?