On Sun, 27 Aug 2006 16:59:52 -0500, "Bill" > wrote:

>
>"M Warren" > wrote in message
.. .
>So now I've replaced the fuel filter and pump and the problem remains. I
>guess I thought I would post my symptoms one more time before I limp it off
>to the only BMW service station around... also the only dealer around.
>
>Engine runs fine, on gentle throttle up to 1500 or 2000 RPM at which point
>power is lost, the engine sort of sputters and pops and refuses to turn any
>faster, even if I put it in neutral. Thanks to all input thus far, I guess
>it's off to the dealer tomorrow.
>
>Matt
>-----
>
>This could be an air flow meter binding problem. I had a similar issue with
>my '86 535i. It would idle fine, but half way up the range of the AFM, it
>would bind a bit and cause erratic running.
>
>Bill in Omaha
>'86 535i
>

I had similiar symptoms with cap and rotor. Have they been replaced
in the past few years? Might be worth a look...