2001 chevy express p0101,p0102

Question

have replaced maf sensor and checked wires and for leakage, will not start unless i prime it and will run fine but will not start,codes continue to come back

Answer 1

P0101 and P0102 can also code up due to low fuel pressure, What you may have is a rational code check fuel pressure , key on engine off the specification are 60 psi - 66 psi