Sucking sound when gas pedal pressed

I had someone work on two of my cars. Both were simple tuneups, and now both cars have the same symptom. When pressing down on the gas pedal it makes a sucking sound with engine hesitation. I dont know but assuming since these vehicles are two seperate cars I am assuming that something didnt get plugged back together right or something. How can I find what is wrong. There is no check engine light but there is a serious problem.