2001 GMC Sonoma gas not getting into the motor

Engine Performance problem
2001 GMC Sonoma 6 cyl Two Wheel Drive Automatic

i have a 2001 sonoma it has 54psi of fuel at the back of the motor i can put gas into the motor out of a bottle and it starts right up i have changed all of the sensors on the top of the motor also the cam sensor in the dis. can someone help