So i have no clue what going on, im late posting it on here,so before i copy/paste my story, ill say Ive just changed the coil pack and the crank position sensor today. The car goes into what i believe is limp mode out of no where. I have a cel but its for the o2 sensor that I havent put back in when I changed my exhaust. Before it used to do it for a second and it seemed like just a rough idle for a few seconds then it would go away. Now i just started the car, tried to drive off and then it goes into a "limp mode" the engine starts sputtering, and seeming/sounding like its going to stall, and i press on the gas and its starts lunging forward and at some point all throttle response is gone and I can have the pedal to the floor and nothing happens. Need to figure this out ASAP. Im lucky I have off work tomorrow so I have at least a day to figure this out.

1997 Dodge Avenger ES - Sold
1997 Dodge Avenger (boosted) - Parted
1996 Mitsubishi Eclipse - Current car