o2 sensors can do that too.

 

Well I officially just started driving my SC300 as of yesterday and I am experiencing the same sputtering problems and I am guessing the same things to do first. Spark plugs, fuel filter, etc...

Oh and when I start it the idle is really ruff and then when I drive it it seems kinda underpowered.

Does yours at a stop light make your whole car shake a littlt bit whille sitting in Drive and if you put in in Neutral while sitting it smoothes the idle out completely?