Reply #154: Many newer standards cannot be push started.

[Xithras]

Push starting is usually done because your battery is dead, and new cars allow the computers to control fuel and air flow, or fire the injectors in response to engine position sensors. That won't work with a dead battery. Even if the computer does have enough power to activate, the last few generations of cars will not inject fuel into the cylinder if the engine is not in a running state. This is done to eliminate having excessive amounts of fuel injected into the engine, which can increase startup emissions or shorten the life of the catalytic converter.