Abstract: A method and system are provided for optimizing fuel delivery to an internal combustion engine. The method and system have particular applicability to an engine having a base or OEM engine control unit (ECU) which outputs fuel injector control signals. In accordance with the method, when the engine is operating in one or more modes, such as a Power Mode, the amount of fuel delivered to the engine is modified, such as by changing the duration of the fuel injector control signals with a secondary ECU. The control signals are modified based on engine speed, and thus in direct relation to engine performance.

Abstract: A method and system are provided for optimizing fuel delivery to an internal combustion engine. The method and system have particular applicability to an engine having a base or OEM engine control unit (ECU) which outputs fuel injector control signals. In accordance with the method, when the engine is operating in one or more modes, such as a Power Mode, the amount of fuel delivered to the engine is modified, such as by changing the duration of the fuel injector control signals with a secondary ECU. The control signals are modified based on engine speed, and thus in direct relation to engine performance.

Abstract: A fuel injector control modification module is configured to modify primary fuel injector control signals provided by an engine control unit of an internal combustion engine. The module is particularly adapted to modifying fuel injector control signals based upon detected variations in fuel provided to the engine. Information indicative of fuel type is obtained by the module from an onboard diagnostic port associated with the engine control unit. The information may comprise fuel trim information which is generated, at least in part, from exhaust gas oxygen content information provided to the engine control unit. The module may modify or completely replace the primary fuel injector control signals at one or more times with secondary signal, such as to accommodate changes in fuel type. The module is particularly suited to addition to an existing engine to adapt the engine to run upon alternative fuels not contemplated by the original engine manufacturer.

Abstract: A fuel injector control modification module is configured to modify primary fuel injector control signals provided by an engine control unit of an internal combustion engine. The module is particularly adapted to modifying fuel injector control signals based upon detected variations in fuel provided to the engine. Information indicative of fuel type is obtained by the module from an onboard diagnostic port associated with the engine control unit. The information may comprise fuel trim information which is generated, at least in part, from exhaust gas oxygen content information provided to the engine control unit. The module may modify or completely replace the primary fuel injector control signals at one or more times with secondary signal, such as to accommodate changes in fuel type. The module is particularly suited to addition to an existing engine to adapt the engine to run upon alternative fuels not contemplated by the original engine manufacturer.