BMW Repair: BMW warm up, coolant temperature sensor, coolant level

Question
Ok I was reading past questions. I saw something about a warm up sensor. Please explain. Any time I get in the car 1985 I have to warm it up about 10 minutes every time. Not just in the morning. If I drive it with out warming up I am not going any where fast. It surges like its not getting air or gas. I replaced the airflow and heat sensors. Could it be the warm up thing? I don't have problems with it any other time.Oh I read some thing about the coolant light staying on. Mine is doing that too! Need coolant or a sensor. LOL. Does this have anything to do with warm?

Answer
The coolant level sensor will not cause it to overheat.  For one reason or another your car is not taking into account that it is cold and needs a richer mixture (similar to a choke on a carburetor engine)  this can be caused by a number of things including the coolant temperature sensor or the air density sensor.
I don't recall where I had mentioned a warm up sensor, I must have been very tired or need to do better proof reading because I don't know that any BMW has a warm up sensor, some have warm up regulators but your model I believe is without one.  First check the coolant temperature sensor, if it's good check the terminals on the ECU where it gets the reference signal from the sensor, if all is good, it's possible your fuel pressure is too low.  If the coolant sensors are good, look at other causes such as a bad ECU or grounded out coolant temp wire.  Have a 5 gas analyzer ran on the car when it's cold to see what the mixture is, it's possible but not likely that the automatic timing is acting up.
hope this helps
-cheers