Questions & Answers for: Ford Expedition fuel trim

...fuel trim if long term fuel trim is above +7 them test sensor with a piko lab scope or watch scan data and create a rich condtion by snping the throttle wide open and watch the sensor if it start to ...

PO171TROUBLECODE P0171 indicates that the long term fuel trims have reached a maximum (should be somewhere around 30-35%). Fuel trims are how much fuel the PCM adds or subtracts.

Fuel Shutoff (IFS) SwitchRemoval & InstallationThere is no 6.4L engine, it's a 5.4L engine, right? Also, for the To Remove: Disconnect negative battery cable. Remove right rear interior trim panel

...tell me where the fuel shut switch is to a 2001 Ford Expedition 5.4 Triton Eddie Bauer The switch is located behind the right rear trim panel. There is a cover to remove, then push the reset

...on a 2002 ford expedition the reset button of the fuel is located is under the clove compartment near the door trim passenger side.remove the plastic door trim,u see the red push button type ...

...fuel trim lean to correct for a over rich condition on right bank only due to a leaking fuel injector most likely That is a common problem on an expedition with 5.4 I have seen people find & ...

...? Spark Plugs over 3 years old ? Dirty MAF Sensor ? I would check fuel trim on a road test & also Mode #06 for cylinder misfire count Could have a bunch of bad COP Ignition Coils or a week ...

...fuel trim & perform several tests, before you replace a MAF Sensor Check for vacuum leaks, plugged fuel filter, and if that don't do it check fuel pressure should be 28 to 48lbs if its your fuel ...

...have that Best to have Professional Test Equip on the vehicle & go for a road test & record & look at data Look at fuel trim-- as you need to isolate ignition from fuel across all ...

Disconnect the battery ground cable. For additional information, refer to Section 414-01 . Remove the LH rear interior trim panel. Disconnect the inertia fuel shutoff (IFS) switch electrical connector