I bought a SC300 and it runs perfect no check engine lights, engine sounds good . when i drive close to 3K rpm at light acceleration the car sputter alittle ... the car runs good After 4k rpm

ANY IDEAS?

 

Check your plugs..wires....distributor cap and rotor....Also could be o2 Sensors or MAF....All of these items are fairly cheap to replace and probably a good idea to replace them..

It will help you eliminate the possiblities...