ok, heres the problem.... when i hit the gas all the way, the car hesitates and then goes. its weird because whe i just keep a steady accel, the car responds just fine, but when i try to gas it again, same problem kicks in. its a pain on the highway when trying to pass slow traffic.... tried a new throttle position sensor, and nothing happened. got a new air filter, same thing. im gonna chnge the sparkplugs tomorrow to see if this solves the problem. any of you guys has any suggestions? i would appreciate some help here.... thanks a lot.