Date registered: May 2011
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
95 S420 high idle and shifting problems
Hi everyone.....have been swapping parts like mad on my 420. run a diagnostic 4 times gives me idle speed control /transmission control codes. replaced both modules. replaced kickdown switch. replaced ecu ,maf sensor, plugs,wires and still idles at 1kto 1200. when driving car heats up great but have to take my foot off the gas so it will shift. when on the road at 40 - 50 mph the car down shifts on its own and the tach runs up to 3500 have to let off of the accelerator so it will shift again. never shifts by the rpm's automatically.backing off of the accelerator is the only way it will shift. Any suggestions would be appreciated.