why are my fuel injectors producing too much fuel? I have changed the CTS already

MAP sensor, o2 sensor or too much fuel pressure. you need a shop with a scan tool that can read your data and advise you on what is necessary. Roy

i have been having the same problems but i did replace the o2 sensor and it made a big difference but it still acts like it has a vacuum leak. when i open the throttle it hesitates and if i cover the intake with a rag it does not change the idle but i can find no vacuum leak and all lines go to the right places. can any one help both of us ?