Download MIL ON – DTC P0456 Servicce Manual ’08 Ford Mustang V6 – SERVICE PROCEDURE Install the scan tool on the vehicle and monitor various inputs at different conditions to see if the vehicle needs to have the fuel pump replaced based on the calculation. Mustang Vapor Generation Test NOTE VEHICLE MUST MEET THE FOLLOWING CONDITIONS FOR THIS TEST: FLI% BETWEEN 15%-50% (INDICATES RIGHT SIDE FUEL TANK IS EMPTY) AND FUEL/VEHICLE TEMPS BETWEEN 70-80 ° (21- 27 ° F C). 1. Install IDS and perform Data logger function. 2. Select the following PIDs: FLI% (fuel level), FRP (fuel rail pressure), VMV # (Vapor Management Valve current), FTP voltage (Fuel tank pressure transducer output voltage), CVV # (Canister vent valve duty cycle). 3. Start engine – run for 5 minutes – turn off engine. 4. Access Jet Pump Module Connector 434 and verify sender resistance is at empty (16 ohms +/- 1 ohm). 5. Start engine, let idle for 30 seconds. 6. Check FRP to ensure fuel pressure is at 40 PSI +/- 2 PSI. 7. Close VMV to ensure a purge cycle does not take place during testing. 8. Record FTP voltage (should be at atmosphere – 2.61 volts). 9. Close CVV and monitor the elapse time.