<E28> more stumbling problems

[whensley11@xxxxxxxxxxx]

With the recent posts of 535i running problems, let me toss mine 
out for review and discussion.

Traveling the interstate - cruise control on - anywhere between 70 
and 80 MPH - 5th gear - the engine will start stumbling.  It will lose 
power - stumble - pick up - stumble - lose power - and the "battle" 
is on!

Well..., if I downshift to 4th - increased engine RPM - the stumbling 
stops.  Same thing for downshifting to 3rd.

Go back to 5th - "resume" on the cruise control - and in a short 
period of time - stumbling and all begins again.

Sometimes it will go away - and not return - for a few hours - or a 
few trips.

Have checked the gasoline - nothing there.

Working with my local technician - we are baffled.

What say you?

Thank you for reading!

Wm. Kim Hensley
BMW CCA #16216
1985 535i - 285,000 miles

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