You can power brake at a stop, but you cannot do this if you are moving. While moving about 20mph start riding the brake and give it gas to try to maintain your speed while increasing brake pressure. You will find out you can't and will come to a stop and the gas pedal does nothing until you release the brake. It doesn't take much braking for the to kill the throttle. I just assumed all Crossfires have this, but I didn't discover this until after the V8 and V8 ECU was installed.