Port Fuel Injection

Port fuel injected vehicle can operate in one of two modes: simultaneous or sequential injection. In simultaneous injection mode, fuel is injected into all cylinders at same time. This is done once for each crankshaft revolution, providing one-half of required fuel for each combustion cycle. In sequential injection mode, injectors are triggered in spark plug firing order.

If airflow meter should malfunction, ECU will enter a fail-safe mode. In fail-safe mode, injection will be determined from internal default tables based on throttle position, CHECK ENGINE light will glow and engine speed will be limited to 2400 RPM maximum. When engine speed cannot exceed 2400 RPM, fail-safe mode is in effect. This informs driver that vehicle needs attention.