9
www.MarinePowerUSA.com
4.
Electronic Sequential Fuel Injection Information
The engines covered in this manual are equipped with
Electronic Sequential Fuel Injection. The main fuel system
components include:
• The electric high and low pressure fuel pumps
• The throttle body assembly
• The fuel injectors
The fuel injection system is controlled by an Electronic Control
Module (ECM). The ECM continually monitors information from
the various sensors on the engine and configures the spark
timing and fuel delivery for optimum performance. Additionally,
the ECM protects the engine from over-revving and monitors the
oil pressure and water temperature.
The following sensors constantly provide information to the
ECM.
• Engine Coolant Temperature (ECT) Sensor
• Engine Oil Pressure Sensor
• Manifold Absolute Pressure (MAP) Sensor
• Knock Sensor
• Camshaft Positioning (CMP) Sensor
• Crankshaft Positioning (CKP) Sensor
• Intake Air Temperature (IAT) Sensor (combined with the
MAP sensor on the 5.7)
• Throttle Position (TPS) Sensor
• Pedal Position (PPS) Sensor
• Pre-Catalyst O2 (O2) Sensor (Catalyst equipped engines)
• Post-Catalyst O2 (O2) Sensor (Catalyst equipped engines)
Engines may include one or more of the following optional
sensors.
• Engine Oil Temperature Sensor
• Fuel Pressure Sensor
• Transmission Oil Temperature Sensor
• Exhaust Manifold Temperature Sensor
• Barometric Pressure (BARO) Sensor
• Super Charger Inlet Pressure (SCIP) Sensor
