Ive tried a few things to help my hesitation. It seemed to go away after my valve adjustment but seems to be reappearing again. I cleaned egr, and did a valve adjustment. It seemed to be running better on sunoco 94 i recently went back to hess 93 and it seems to be hesitating again, it is very subtle right alot less than it previously was.

 

have you checked your timing?

 

no i havent