Rep Power: 0

2009 Civic, 120k miles. CV boots changed 2 years ago but suspension, arms etc. are still original. did a tire rotation recently as well (mentioning it but not sure if that is the cause of my issue).
When I accelerate I feel the car shudder/vibrate when the gas pedal is pressed. when I let go of the gas the shuddering stops. also seems to occur only a narrow speed range of ~50-60mph. below or above this speed range i don't feel the shudder when accelerating. hitting the gas pedal for a quick acceleration that crosses this speed zone (i.e. going from 40mph -> 65mph), also don't feel the shudder (or perhaps I'm not paying close enough attention but the shudder is not there)
would like pointers to things to examine

best
-P

 
Rep Power: 244

Inspect your motor mounts. You can move the tires around to see if that makes a difference.