Yes, I had an intermittent fast idle. I had the problem for a couple of years but could not catch it. It finally got bad enough that I was able to track it down. I had changed the valve and the control with used parts and the problem would go away for a while and then come back. Hasn't failed since I cleaned and adjusted the wire connectors in the plug. It's been several years now with no problems.

Paul

__________________
84 500 SEL (307,xxx miles)