I have a 2000 civic SI with an iceman intake, 2 1/4 inch piping with a universal exhaust. anyways, lately i've noticed that when im cruising, lets say, in 2nd gear and when i reach my mid range rpm, i get a hesitation. it feels like im tapping the accelerator on then off back and forth but im not moving my right foot. it's steady on the gas and yet my engine seems to cause the car to jerk forward than back. anyone kno what mite be the problem here? it does it in third gear too. help???

 

Reset the ECU?