I have an 03 Heritage its fuel inj. I started it up the other day and it reving at 2000 rpms normal for it is 950. When I took off it cough and hesitated. Took to my inde. And he is good. Local harley dealers even send him work anyway, he checks it out and says I have an intake manifold leak that harley uses rubber gaskets and they have replaced a lot of them, he replaces them with viton seals. I rebuilt a lot of pumps and they are suppose to be the best. The short of it is I brought it home ran fine went on a long ride today now doing the same thing and my mpg is way off. Any thoughts would be great

 

Spray around the intake with brake cleaner. If no change in idle or engine sound possible idle air control solenoid.