The phrase "right pedal" refers to the accelerator pedal in a vehicle, which is located on the right side. It is used to control the speed or acceleration of the vehicle by pressing it down with your right foot. Full definition
It's not a deal breaker but the computer could be programmed for a more responsive right pedal. (cnet.com)
Because of those traits, the SRT may be a monster, but it can be operated sanely on public streets as long as the driver can keep the foot out of right pedal. (autoweek.com)
A power output of 149 hp won't impress anyone, but 273 lb - ft of torque and a responsive right pedal make it more lively than your typical compact car. (automobilemag.com)