i got a holley 750 hp center , proform billet metering blocks w/ the 4 corner idle circuit, proform billet base plate . my problem is the car won`t idle at all but will run as long as u keep pumping the gas . everything is new straight out of the box , car ran fine with a 650 holley dp with mech sec. please help !

Is the vacuum port on the rear of the base plate capped?

yes , i jus took it apart and found a hole behind the power valve , the hole in the center section . must be a bad casting , i`m sure that the problem . but thanks anyway .