Well, now I know why it was running rough...

[bgrattan]

Check out this spark plug. All eight were pretty much the same.
https://www.dropbox.com/s/y5agjdfmxefa1g4/plug.jpg?dl=0
Any guesses on how many miles were on it?

Also, if you Expedition seems to accelerate decently but has a hard time when coasting--it might be the spark plugs.

 

[ManUpOrShutUp]

Jeez, that looks well past its prime.

 

[Aspen03]

Guessing north of 100k.

 

[riphip]

If plugs look that bad, check all the vacuum hoses, etc for deterioration.

 

[red-russian1]

I think the one on the right had maybe somewhere around 2 years and about 30k miles on them. I reordered the same exact plug this last time (from Amazon [emoji1751]) but received a different plug (one letter off and the new ones appear to be platinums??).

Sent from my LM-G710VM using Tapatalk

 

[bgrattan]

Answer: 195K miles.

 

[riphip]

Low maintenance finally catches up. These are fine engines

 

[ManUpOrShutUp]

Answer: 195K miles.

Damn and I thought I was bad with my wife's Mazda. I changed her NGKs at 155K (simply forgot since it wasn't my car). They looked great though. I usually change the ones in my truck every 75-80K.

 

[texasscot]

i changed my 2003 5.4 plugs at c120k mls and the gaps were so large it was hard to believe a spark could jump across them. Often folks change the front 6 and leave the back 2 as they're trickier. I suppose it does reduce your chance of problems by 75% lol.

 

[BlackCoffee]

What was the point of running plugs for 195K? Did you at least change the oil on interval?

 

[bgrattan]

I bought it at 184K and mistakenly assumed they'd been keeping up on such things.
Yes, the oil has been changed on schedule--at least since I've owned it.

 

[BlackCoffee]

Now I understand. Although those do not look like original Ford plugs, so it may not be 195K.