Guys I have been having the same hesitation problem for over a year and it seems that nothing works. I cant pass 4,000 rpm in any gear except 1st. Sometimes I can pass 4,000 put rpms go up really slow.Also when I press the pedal all the way i feel the car hesitating maybe there is a blocking in the cataylic converter? Tell me what you think. Has anyone changed theres recently? :-(