So my service engine light came on about three weeks ago. I went to auto zone where they have a code reader, and it said the o2 sensors were bad. I just got done changing those out. Now it runs like shiat!!! When I give it gas it boggs down for a little bit , then it starts picking up power. Am I missing somthing here. Maybe a bad egr valve, clogged fuel filter, mass air flow sensor? Please help?? Any input is appreciated.