I think your maf sensor is going. My started doing it randomly then it got worse and a few days later I couldn't even go over 2000 rpm with out it stuttering like made. Changed out then maf sensor and it runs fine. Hook a volt meter up to it and rev the engine and see if it changes at all. I have a computer that could read all the info from the sensors and it showed mine not reading any intake flow.

 

i run seafoam through the tank evry 5K miles and it has a new fuel filter. this is really racking my brain but im leaning on the MAF sensor. imma hook my new system up tomorrow and see what kind of reading i am getting out of it. thanks man