Check your owners manual. If you don't have one copy & paste this link. http://www.genuineservice.com/genuineservice/en/gloveboxresults
The recommended spark plug gap for a 2003 Ford Expedition 4.6 is .054"
The brake controller has to be hooked up to a power source. The controller also has to be hooked to the brake switch or tail lights, then to the plug for the trailer.
if it has the plug in the back of the truck for trailer brakes then it is under your dash. it should be a female plug. about in the middle of the dash(more twards the left) you can get a plug from ford that plugs right in and it will have leads off of it to wire right to your brake controller. makes it super easy
beats me
Tie the wires on the new plug into the existing brake and turn signal wires.
Check to see if your brake lights work. If not, there is a switch attached to your brake petal Assembly that probably came loose. plug it back in and it should work....
Check under the hood decal info.
In a 2002 Ford Expedition : ( No , not really ) both the 4.6 and the 5.4 have the Coil On Plug ( C.O.P. ) ignition system , but there is a connection between the individual coil and the spark plug
( .054 inch ) according to the 1997 Ford Expedition Owner Guide
No , both the 4.6 and 5.4 liter V8 engines in a 2000 Ford Expedition have Coil On Plug ( C.O.P. ) ignition systems
Yes , the 2007 Ford Expedition engine has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils
not sure, but most of them have a orange wire and a blue wire run from under the brake booster, to the back. these are perfect for your trailer brake controller and break away power.