2007 impala exceleration problems on 2007 Chevrolet Impala

have replaced cat converter and lower o2 sensor and plugs and wires and car still hesitates and spudders when i push gas

Asked by for the 2007 Chevrolet Impala
Do you have an SES light on? If so what are the codes?
1 more answer
have u figured out what was your problem my car is doing the same?