Remove fresh air line at fuel vapor separator (line goes from fuel filler housing to fuel vapor separator near carbon canister). No - Go to Step 5 to inspect fill pipe/tank for blockage.Ĥ. Yes - Go to Step 4 to repair EVAP restriction.ī. Monitor the fuel tank pressure PID (FTP) on IDS and start refueling, stopping at 7/8 tank or less (add less than 2.5 gallons). Yes - Go to Step 4 to repair Evaporative Emissions (EVAP) restriction.ģ. Install IDS and check for diagnostic trouble code (DTC) P1450. Repair is complete when concern is found.Ģ.

It is not necessary to complete all steps listed. SOME FILLING STATION PUMPS MAY DELIVER FUEL AT A RATE GREATER THAN THE DEPARTMENT OF TRANSPORTATION (DOT) SPECIFICATION, OR MAY USE NOZZLE DESIGNS THAT ARE OVERLY SENSITIVE AND TEND TO SHUT OFF PREMATURELY. NOTE THIS CONDITION MAY STILL OCCUR EVEN AFTER THE REPAIR BELOW IS COMPLETE. Several variables, including variations in fuel pump nozzles, fuel flow rates, and fuel flow pressure may result in the premature automatic shut off of the fuel fill nozzle making it more difficult to fill the fuel tank.įollow the Service Procedure steps to correct the condition. Depending on the make of the car, you will find the fuel pump relay under the hood or under the dashboard, near the steering wheel of the car.Some 2005-2007 Five Hundred, Montego and Freestyle vehicles may experience premature automatic shut off of the fuel fill nozzle. Its sprockets attach to the engine assembly. This device is a black plastic component, set in a small box with a wiring harness attached to its underside. Controlled by the engine control module, the fuel pump relay controls the current sent to the fuel pump.

The fuel pump relay is also called the relay switch and its functions are similar to those of the automotive fuse. As long as the car is running, the fuel pump runs on the power it receives from the oil pressure sending unit or any other such power source. While the fuel pump is active as long as the car engine is running, the fuel pump relay works only at startup and when you turn off the ignition. Upon receiving this current, the fuel pump sends gasoline to the engine and the car starts running. This device sends an electric current to the fuel pump. Every time you turn on the ignition of your car, you activate the fuel pump relay.

2005 expedition fuel pump