Searched the forums on engine stalling and most look to happen with the manual. I've got a '01 325XiT automatic that is doing it when coming to a stop (light, stop sign, etc). Starts right up again and seems to idle normal (although I seem to think there is a slight roughness to it). No error codes, no service light, nothing. Sat at the dealership all weekend and they can't reproduce the problem; tell me "no code, we can't help". Anyone have any ideas? Had an exhaust cam sensor replaced last year for a similar problem. Any way to test an intake cam sensor? I'm still in disbelief with the dealer.
Hi, My BMW is a 325i which had a similar problem that when the vehicle was slowed toa very low speed such as crawiling in traffic or making full lock RH/LH turns the engine would stall.
The BMW dealership checked the system and no codes were found or other symtoms to suggest anything wrong.
After discussing the problem the expert technician he hooked the car to the shop computer and raised the idle revs from 750 to 822. My car has 46500 miles on the clock.
The problem has not repeated in over 1500 miles.
The MAF may be a problem which can be 'fixed' by cleaning the filament sensor. Do this by spraying MAF or Throttle Body aerosol cleaner and shake dry. Do not attempt to dismantle it - very costly item if you bugger it up.
I have a 2000 323Ci automatic with 85K miles, and it just stalled in traffic while making a slow right turn from a stop sign. I searched the forums and found your posts ftom 5 years ago to be the most relevant. Did any of you ultimately determine the root cause of the stalling?
I just removed the MAF and examined it--looks fine. I did not attempt to clean it. For several months prior to this the car has also developed a slight hesitation from its first acceleration on a cold start, so I am thinking of replacing the MAF anyway if this can help driveability problems.
Most stalling is caused by the MAF sensor or the idle control valve. I believe that the MAF sensor can only be tested with a computer. You can't just look at it and say its good or bad. As mentioned above cleaning the MAF sensor can help, if done properly.
The idle control valve could be malfunctioning or being dirty. You can test the idle control valve by testing the resistance as described in the Bentley manual. A good cleaning can also fix the problem.
Hope this helps.