I have this hesitation only during these RPM'S and none else where in the RPM Band. Started happening after I left the dealership getting a new air-filter installed and having the dealership clear my faults and check-engine lights that were on because of a bad Mass Air Flow Meter. No lights on the car now but I have this small hesitation.
Plugs and fuel-Filter were replaced 15,000 KM ago. Any ideas??