95 740il

car run rough cold or hot the code that pops for the o2 sensor. changed them out still runs horrible. It has gas in the oil and does seem to be down a few cylinders. im an old gm person myself and got this for the wife to run around town. i started it and unplugged the coil pack from each cylinder but it didnt change the way it ran at all so im lost. the car sat for a year due to a recent deployment and now im not sure what else to try just really want a car my wife can have fun with while we are stuck here in hawaii.