Q: What would cause the vibration i feel in my gas pedal and floor board?

Vibration felt through the floorboard can be due to tire imbalance, tire defects, or excessive radial force variation, on rear axle mounted tires. Contributing factors in the circumstance you are describing could be worn struts in the suspension. If there are flat spots on the tire tread, that would be indicative of worn struts. If, by chance, you are also feeling the vibration in the steering wheel, that is usually due to imbalance in a front wheel/tire assembly, defects in a tire or tire(s) and/or a rim is bent. If the vibration is not detectable in the steering wheel, it could also be due to defective engine mounts. One way to check for mount problems is to shift from "neutral" to "drive" and back, while the engine is running and stationary of course. If the vibrations disappear or reduce dramatically in "neutral," it’s likely that you need new engine mounts. If you request a vehicle vibration diagnostic, a certified mechanic from YourMechanic would evaluate all the possibilities, including tire balance, and resolve this for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.