Abstract: A fuel system priming method for an internal combustion engine having a returnless fuel system and electronic fuel injection includes sensing fuel pressure rate of rise during priming. The fuel pump is first activated to pressurize the system and then the injectors are controlled for a short interval in response to the sensed rate of pressure rise to vent trapped air in the fuel system. The fuel pump is then activated again to pressurize the fully primed fuel system for quick engine starting.

Abstract: A method of controlling engine starting of a vehicle having a powertrain control module and passive anti-theft system includes the steps of operating the engine after validation of a code by the passive anti-theft system, monitoring stopping of the vehicle engine during normal operating conditions of the powertrain control module, setting a fuel value in a software register of the powertrain control module to a non-starting value which fuel value is defaulted to in case of abnormal operation conditions of the powertrain control module, and disallowing starting of the vehicle engine during abnormal operating conditions of the powertrain control module when the fuel value contains the non-starting value.