Glad you figured out the problem.

If there is still some hesitation in that rpm range, cleaning the EGR port could eliminate the problem. On your 4-cylinder, you have to remove the upper part of the intake and clean the port going from the top of the lower part of the manifold to the egr valve.

 

Great to hear, and thanks for letting us know. Usually should start with the easy simple things first.

 

next is to clean the egr valve or replace.then the o2 sensors.