Thanks; that would be very helpful.

In one of the posts that I found, one of the experts said that, in a situation like this, the ECU must be operating on a false input (or absence of a true input), so that it sends the wrong signal to the Idle Speed Controller. I think that the key to my diagnosis is to track down that false input.

Then, of course, the repair has to cost less than the value of the car.

Andrew
1989 190e 2.6