I have the same problem, except the car "jerks" while driving in addition to the stalling engine problem... I believe the problem to be the air fuel ratio sensors and the oxygen sensor.... If anyone would be willing to help me out, how do I go about removing the AFRS and oxygen sensor? I have a 1999 es300. I plan on buying OE parts, but would appreciate help on removing them so that I don't inadvertently damage my car...Thank you!