The Single Point Fuel Injection (SPFI) system is used on the 1.8L engine only.
The system electronically controls the amount of injection from the fuel injector,
and supplies the optimum air/fuel mixture under all operating conditions of
the engine. Features of the SPFI system are as follows:
- Precise control of the air/fuel mixture is accomplished by an increased
number of input signals transmitting engine operating conditions to the control
unit.
- The use of hot a wire type airflow meter not only eliminates the need for
high altitude compensation, but improves driving performance at high altitudes.
- The air control valve automatically regulates the idle speed to the set
value under all engine operating conditions.
- Ignition timing is electrically controlled, thereby allowing the use of
complicated spark advance characteristics.
- Wear of the airflow meter and fuel injector is automatically corrected so
that they maintain their original performance.
- Troubleshooting can easily be accomplished by the built-in self-diagnosis
function.
