There is no need to bleed the system on a gas engine car. The system bleeds itself after a few seconds of ignition voltage.

In a diesel, the volume of fluid put through the barrel on each stroke is minimal, thus without bleeding you would run down two or three batteries before enough fuel works its way to the injectors to provide total liquid, thus adequate pressure to overcome the hundreds of pounds of pressure in the cylinder.

A gas engine does not have any of these problems. To begin with the pump is electric and starts building pressure and providing volume immediately upon receiving voltage. Secondly, once the injector opens, it is injecting fuel into an intake runner that is not under pressure as is a diesel cylinder.

Hope this helps,