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volcoms104
10-27-2010, 08:42 AM
i have a 2001 bmw 530i and it just shuts off when ever im driving down the street. or accelerating. after it shuts off i put it in park and turn it on. then couple minutes later it happens again.. any one have the same problem?
kaineb
11-01-2010, 05:48 AM
Have your fuel pump tested for flow and pressure. Likely a good starting point. After that would be a crank sensor next viable cause.
e39beast
11-01-2010, 08:05 AM
I had a very similar problem on my old car, not an E39, and the culprit turned out to be a bad crank position sensor as stated by kaineb. It is a very scary, and dangerous, problem as you are instantly without power steering or assisted braking. My advice would be to keep the driving to a minimum until this problem is resolved as you never know exactly what kind of situation you are going to be in the moment it shuts off on you next.
Lord DRIFT
11-01-2010, 09:41 AM
Do you have a CEL? -
Petes540i6
11-01-2010, 11:52 AM
Do you have a CEL? -

Have you checked the codes and what are they. There may be codes that do not trigger the CEL.
NYZ93
11-01-2010, 02:13 PM
alternator?
volcoms104
02-25-2012, 07:48 PM
Turns out it was the u2 sensors , sorry for the looong reply
edjack
02-25-2012, 10:53 PM
What are "u2 sensors?"
Big Chaze
02-25-2012, 11:14 PM
Think he meant 02 sensors
JaimeZX
02-26-2012, 12:14 AM
The car hates Bono.
volcoms104
02-26-2012, 01:02 AM
Yes, o2 sensors works Great but idles low, up to the point That car vibrates at a light or complete stop. Cleaned idle control valve. Still doing it
g00dwagen
02-26-2012, 07:45 AM
You could smash all the U2 sensors with a hammer & the car would still run. It isn't fixed.
kaineb
02-26-2012, 08:06 AM
You have to drive to the street with no name to get that properly checked!

All kidding aside, You may have a fuel delivery or vacuum leak, CCV is often a major cause of issues like this. But there are many causes in these cars.
Big Chaze
02-26-2012, 09:07 AM
faulty coils/spark maybee??
larrym3711
02-26-2012, 09:36 AM
As indicated by others it could be many things.

As indicated it could be many things. In my experience the behavior you describe is not likely the CCV. Are there any codes being thrown? Sudden death while driving is fuel supply or electrical related. Fuel delivery is one item you need to check. Another is CPS failures. Ignition fails (like a bad coil) will not usually kill the engine completely but make it run rough. Can you provide any other info?

larrym3711
2001 540iA Sport
topaz540i
02-26-2012, 10:03 AM
faulty coils/spark maybee??

Chaz, coils and plugs = misfire codes.

Perhaps a faulty ignition switch is shutting her down? If the car thinks you turned the key...
Do other things besides the engine shut off like the radio? Things that would normally only turn off if you pulled the key?
Big Chaze
02-26-2012, 10:04 AM
Chaz, coils and plugs = misfire codes.

Perhaps a faulty ignition switch is shutting her down? If the car thinks you turned the key...
Do other things besides the engine shut off like the radio? Things that would normally only turn off if you pulled the key?


not neccesarily,,,ask me how I know..If its not fuel related, maybe cats?