Escort L4-122 2.0L SOHC VIN P SFI (1999)
Variable Induction System: Description and Operation
Intake Air System
The Intake Air system provides clean air to the engine, optimizes airflow and reduces unwanted induction noise. The Intake Air System consists of an air
cleaner assembly, resonator assemblies and hoses. The main component of the intake air system is the air cleaner assembly. The air cleaner assembly
houses the air cleaner element that removes potential engine contaminants, particularly abrasive types. The Mass Air Flow (MAF) sensor is attached
internally or externally to the air cleaner assembly and measures the quantity of air delivered to the engine combustion chamber. The MAF sensor can be
serviced or replaced as an individual component. The intake air system also contains a sensor that measures the intake air temperature which may also be
integrated with the MAF sensor. (Refer to Electronic EC Hardware - PCM Inputs for additional information on the MAF and IAT sensors.) Air induction
resonators can be separate components or part of the intake air housing (i.e., conical air cleaner). The function of a resonator is to reduce induction noise.
The air induction components are connected to each other and to the throttle body assembly with hoses.
The Escort/Tracer 2.0L (2V) intake air sub-system is the IMRC electric actuated system.
This subsystem is used to provide increased intake airflow to improve torque and performance. The overall quantity of air metered to the engine is
controlled by the throttle body.
