here is the story, i took my car on sat and got the oil changed, while i was there they flushed out the oil system and fuel system, then they added like some additive called tx7 or something, then they also replaced the fuel filter. on sat the car ran fine, no problems, even took it out sat night, didn't race anyone, or really even pushed it hard. then sunday morning, i went to church, came back, then when i went out agin i got to a stop light and the car was ideling real rough, didn't think much of it, noticed it agin when i pulled into my girlfriends driveway, then later on my way home. so i unpluged the battery to erase the O2 sensor code, to see if any codes would pop up. on my way back to college when i got on the freeway i could teel the car would like slowslightly and lundge, almost liek it was not getting enough fuel or something. and whan driving from a stop it would kind of jerk as it accelerated. while on the freeway the SES light came on and started blinking, then it would go steady for a while, then start blinkng, and so on it seemed like it would start blinking every time i went up a hill (overpass) or slowed down then accelerated back up to speed.
here is my question, could a bad fuel filter be causeing this? or could it be those fuel and oil additives those people put in my car? any recomendations helpful. i also have a exaust leak, but i have been running with that since july.