Originally Posted by pje65
1) I read somewhere on here that you can go backwards in reverse without any gas, and that this has something to do with the drive by wire.
The "engine computer" (PCM) will open the throttle to some degree when you apply a load to the engine and you have your foot off of the accel pedal (i.e. it tries to maintain a "target" RPM).
In most cases, I wouldn't slip the clutch unless I was trying to back up on an incline. Rather, I would use the clutch pedal to get the car rolling backwards and then clutch in.