In the last few days I've developed a phenomenon whereby when I step off the gas and let the engine idle, the RPM will "ring down".
Initially it fluctuates up to 700 and then down 620 RPM on perhaps a 4 second period, with the magnitude of the fluctuation dying down after perhaps 20 second to a somewhat steady idle at 670 (where I set it long ago).
Anyone seen that before? Its a little annoying as I can hear the speed changing and I'm a fussy man.
Initially it fluctuates up to 700 and then down 620 RPM on perhaps a 4 second period, with the magnitude of the fluctuation dying down after perhaps 20 second to a somewhat steady idle at 670 (where I set it long ago).
Anyone seen that before? Its a little annoying as I can hear the speed changing and I'm a fussy man.