BMW: 1989 325i, bmw 325i, sensor controls

Question
I own a 1989 BMW 325i Convert that has a curse on it. I have replaced every water hose and the entire steering system under the hood and now the latest thing is that it will start/run fine one day and be very difficult to start the next or start OK then stall when put into gear. When it starts stalling it will do it every time you slow down to stop. It may start right up or take 5 minutes to start with the accelerator on the floor. I have replaced the o2 sensor, the temp sensor and I have a code reader the tells me everything is OK. Which of the air sensor/controls do you think could be the problem.

Thanks

Dean

Answer
Dean,
 I would perform a Tune-up on the car to make sure the ignition system is in tip top shape.  Plugs, plugwires, distributor cap and rotor, and possibly coil.  All of these should be replaced if not done so in the last 3-5 years.

 Try this and let me know what happens,
 Josh