in the morning i noticed my rpm wasnt staying still while iddling.. didn't really think much. till i was on my way to work, a check engine light came on and anytime my car is in neutral the rpm goes up to about 2k then a little lower then back up then to like 1,200 rpm .. it will just keep going up and down and when i accelerate it feels like its struggling to get power and jerks... help?

 

Could be a bad IACV or a vacuum leak or a bad tps. Just a thought. Find out that engine code. Good luck.