Re: Surging M50 Engine!!!!!!!

["Dave Lehmann" <DaveLehmann@xxxxxxxxxxx>]

>Hi all. Recently my 92 325is had a problem. The car was warm, and running
>perfectly. I stopped for lunch, and when I returned to start the car after
>about 1/2 hour the engine started surging. It went from 500 rpm's to 3000
>rpm's. Up and down. It was so bad it was undrivable. I had the car towed to
>the local shop. At the shop the car was immediately started and it did the
>same thing. The mechanic opened the hood and looked for a few seconds, and
it
>suddenly quit and went back to normal. He pulled codes (as I have no
equipment
>to do so), and found Idle Position Sensor. I left the car for two days, and
it
>never did it again. The mechanic whom I trust said that the valve could be
>sticking, but did not want to replace a $100.00 part if he was not sure. I
>have driven the car about 200 miles since with no other problems. I am
worried
>and am considering replacing the part myself as I am kind of anal about my
>car. I want it to be perfect and fault free. The car has only 48k on it.
Has
>anyone experienced similar problems or does anyone have any suggestions?
>thanks,
>Corley Heiserman
>92 325is


Had this happen on my daughters 528e.  I probed around and found a loose
wire connection on the idle control valve.  I soldiered it back to the
connector and it's been perfect for 2 years and 12,000 miles.

Dave Lehmann
'86 528e now @ 230,000 miles+
'96 Dinan 3

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