The Engine - more specifically - the heads.
the best spark plugs for all ford vehicles are the motorcraft type, which they come from ford.
Not bad if you can just keep the spark plugs from blowing out.
If you have the original Ford plugs, you only need to replace them every 100,000 miles.
it not uses 12 spark plugs, it uses 24 sparks plug due that was the original design from ford's engineerings
Three on each side of the motor. Follow the spark wires.
Autolite AP26. Gap .050.
There is most definitely a problem with the spark plugs on the Ford Triton 5.7 V-8. The problems range from plugs that you can't remove to plugs that blow right out of the head. When that happens, it takes the threads with it. Do a search for Triton spark plugs. Rick I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://free-auto-repair-advice.blogspot.com
For 1998 Ford Escort ZX2 with a 2.0 16 V Zetec VCT motor use Champion Platinum RE 7PYP6 spark plugs.
Blown Head Gasket or Warped Head from Overheating
On the Ford Triton engines a separate coil is used for each cylinder. The coils are mounted over the top of the spark plugs. To access the spark plugs, remove the screws that secure the coils to the top of the cylinder heads and gently pull up on the coil to remove it and the short 3-4 inch plug wire that attaches the coil to the plug. A special knuckle joint or flex extension will be required to remove some of the plugs located at the rear of the engine. There are 4 spark plugs on the drivers side of the truck, four on the passenger side of the truck.
On the inside of the valve covers in the intake manifold valley. You probably have Coil-Over-Plugs (COP) they are next to the injector solenoids.
Does a 2003 ford expedition have spark plugs?