Does anyone on the lost have any experience with Lycoming engines backfiring
or making a popping noise while taxiing?

My Lyc 320 just started this strange behavior.  Only when the engine is
warmed up.  The Pops are not continuous, only random and intermittent.

I tried adjusting the idle mixture to a leaner setting.  That didn't seem to
help.  Any suggestions would be appreciated.

Bob Jude