when i place a screw driver on each of them to test them i can feel the vibrations on my hand and one of them have harder vibrations.

After driving the car pretty hard i used to hear a very loud tick towards the back of the plenum. i switched the front injectors with the back and the tick followed. ive narrowed it down to one injector. can this be the reason why my car hesitates from stops and hesitates at full boost?...also when i rev the car high and release the throttle the car smells like gas