meaning just that.....if motor is cold (sat for atleast 6 hrs) if fires up fine no problems at all. however if you warm motor say 30 min of driving and stop at store ect and try and restart it fires right up then starts ideling rough and wont rev.....so i turn it off,samething again for at least 5 times...then finally it will start and rev with no issues. seems that this only happens when motor is hot and feels like running on 4 cyl

possible causes/solutions.............im new to this sc400

 

Plugs, caps, rotors, fuel filter

 

MAF will do this also.

 

possibly fuel pump also. tacoma's are well-known for doing what you just explained.