2000 540i Cold Start Issues

[hollywood540i]

I have a 2000 540i auto. When the temp is around 27-30 degrees the car barely wants to run. It misses and wont idle. It even has died a few times. These symptoms wont completely disappear until a fully warmed up and after the car has been run for a long time. I am new to BMW's and MAF style injection systems. Could the MAF of IAT be malfunctioning? Any suggestions are greatly appreciated.


Thanks Bryan

 

[hollywood540i]

bump

:bump

 

[hollywood540i]

I know why it ran bad that day. I left town for a week and left when it was 75, and it was 32 that early morning duing startup.


However it still seems to be missing during really cold warmups. Any ideas?

 

[Chesty Bonds]

My dad used to have an E34 530i and every now and then (esp. when it was cold) it would idle really roughly, like it was running on only 6 cylinders, which was probably the case. Each time a little blip of the throttle would help the engine clear its throat and we just put it down to a few sticky valves or something like that. In any case, the problem would disappear once the engine was running for a minute or two.

Other than that, I would just do a google search for your problem and see what comes up. It's probably a common issue with the M60 V8.

 

[wood_e]

I would check your diagnostic codes at your local auto parts place (they do it for free). Even though your check engine light may not be illuminated, a sensor may produce a fault.

 

[B M W]

Get the check engine light checked. Every car just needs time to warm up. In those freezing temperatures I would defintely expect some sort of rough idle where the car has to rev upa dn down a bit in order to help itself warm up faster.