Download 1988 Toyota Celica Fuel Injection System Repair Manual – 1988 FUEL INJECTION Bosch AFC Toyota; Camry, Celica, Corolla, Cressida, Land Cruiser, MR2, Pickup, Supra, Van, 4Runner DESCRIPTION For specifications on Throttle Position Sensor (TPS), idle speed and mixture, and fuel pump output volume, see appropriate article in TUNE-UP PROCEDURES section. The Bosch AFC (L-Jetronic) fuel injection system is used on all models. However, variations may exist between model applications. This article covers the Bosch AFC system in general, with manufacturers’ differences noted under SPECIAL FEATURES. For computer control information, see the appropriate article in 1988 COMPUTERIZED ENGINE CONTROLS section. The Bosch Airflow Controlled (AFC) fuel injection system is an electronically controlled system operated by incoming airflow. Some vehicles are equipped with a potentiometer to measure incoming air flow, while other vehicles use a hot wire type airflow sensor.