EVAP System

PCM
- Calculates a variable duty cycle based on a monitored FTP sensor signal input and the desired amount of purge vapor flow to the intake manifold for a given engine condition. It can then output the duty cycle to the solenoid on the EVAP canister purge valve.
- Uses the EVAP Running Loss System inputs to evacuate the system using the EVAP canister purge valve, seals the EVAP Running Loss System from atmosphere using the CV solenoid and observes total vacuum bleed-up lost for a period of time using the FTP sensor.