Fuel Control: Deceleration

This is an open loop mode with engine at operating temperature. During hard deceleration, PCM receives inputs from A/C switch, battery voltage, ECT sensor, CKP sensor, IAT sensor, MAP sensor, TP sensor, CMP sensor, P/N sensor and VSS signal. PCM will ignore HO2S signal and enter a fuel cut-off strategy when vehicle is under hard deceleration with proper RPM and closed throttle conditions. If hard deceleration does not exist, PCM will determine proper injector pulse width. PCM will adjust IAC motor and ignition timing based on above inputs.