On a 1998 Ford Expedition : There are ( 8 spark plugs ) for the 4.6 and 5.4 liter V8 engines
Screwed into the heads.
Screwed into the heads.
Your 1998 Ford Expedition 5.4 L - V8 engine has a COIL ON PLUG ignition system The engine cylinders / spark plugs / coils are numbered : FIREWALL 4 - 8 3 - 7 2 - 6 1 - 5 FRONT
FOLLOW THE SPARK PLUG WIRES TO THE BLOCK. AND YOU WILL FIND YOUR PLUGS. A FEW OF THEM ARE HARD TO CHANGE BUT JUST PERSIST AND YOU'LL BE FINE
you will need a 5/8 spark plugs stocket and a 7mm stocket have fun it not a go job about 5hr. to do just did one Sunday
It has spark plugs. They are just hidden from view.
I Don't Think It Has Wires it has a coil pack on each spark plug ----------------------------------------------------------------------------- Only the 4.6L has plugs and wires , plus 2 coil packs. The 5.4L has plugs no wires, plugs 8 coil packs.
Check the Vehicle Emissions Control Information ( VECI ) decal located in the front of your engine compartment ( it will show what type of spark plugs to use and the spark plug gap )
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
HTE SPARK PLUGS ARE IN THE TOP OF THE ENGINE JUST IN THE MIDDLE
Auto Zone will read your computer codes FREE.... No more guessing... On my 1998, Ford Expedition XLT (4.6L) I had the same problem It ended been bad spark plugs. Therefore, I change plugs and wires. Problem was solved.