Great place to start is to track down some BG 44K to clean up injectors/combustion chambers/valves. Makes Techron look worthless. Also, replace your trans mount.

Those things done, let us know, and good luck!

FWIW, an M119 does NOT do that-when mine has fresh caps & rotors, the only way to tell its idling is to look at the tach

__________________
"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo