1999 f-250 4x4 5.4 motor

[hardbound]

What is the best spark plug for this 5.4 motor . New to me truck and have no idea how old plugs are. Have read other forums post about how some brands of plugs are better than others in this motors.

 

[blacksnapon]

Unless you're getting into high horsepower and massive modifications, stay with OEM. Motorcraft is the way to go.

 

[hardbound]

Just a stock motor thanks for your reply.

 

[Beach66Bum]

Let us know how it goes when you change your plugs. I need to do mine but been putting it off since I've been reading about how much of a PITA it is to do. Thanks.

 

[hardbound]

10.4 I will old owner said he had replaced them but have no idea how long ago. Also got a deal on accel coil packs will replace them as well.

 

[O'Rattlecan]

I had the 3 valve 2005 motor, so it's different, but Motorcraft were the only ones that ran well. No problems with the aftermarket coil packs, however. They worked fine.

Ryan