I want to express my greatest appreciation to all members of the forum for the continuous support offered by all.
I was able to change the CRANK POSITION SENSOR in 10 minutes thanks to the pictures posted on this thread. The last time I took my xfire to the dealership, it spent 6 months there and cost me $900. I learned that " if the engine turns over but doesn't start it's the Relay Module. If it doesn't turn over it's the, it's the Crank Sensor.
Again thank you all