Engine code 61 help

[Johnny5]

Hey guys so i replaced my injectors, coil packa, wires and a few upgrades but the secondaries arent kicking in. I thought it may be the 2nd fuel pump but i pulled code 61 yesterday which the manual states is either vacuum pump or the vacuum transduser (provides signal to computer). Its hesitating when given heavier throttle and revving slowly. Anyone have experience with this?