They really are a piece of crap. I just had to spend money for my first repair on my 2011 Eco-boost at 52,000 miles. $60 for a set of plugs and 1.5 hrs to put them in. That comes out to a little over $1 for every 1000 miles for repairs. You would think they would be built better than that.😉 As a side note this was one of the easier changes I have did on a newer engine.

 

That's a refreshing post...I clicked on it expecting the worst. Reps sent

BTW - How did the plugs look and was there any reason why you replaced them so early?

 

Why would you have to put plugs in at 52,000 miles

 

Mine were done at 61K. My dealer told me that they are seeing EB trucks between 50K and 70K miles for plug changes. Some are lasting longer.

 

It had starting missing on #6 cylinder. I talked to a few friends who had Eco with more miles than mine and they had to do plugs between 50 and 60k miles, so I figured I would try the easy fix first, and it worked. The old plugs were pretty bad when I pulled them. The gap on a couple of the old ones was 48. If you have ever did a plug change on a 2v 5.4 you will be pleasantly surprised when you do yours.

 

This 3.5 ecoboost eats plugs. Rule of thumb over the years has been to change every 20k miles to prevent misfire / stutter. The reason that it blows out spark and misfires is condensate from the intercooler is passed through to the spark under boost. To eliminate this, most ownets have need drilling a 1/16" weep hole to get rid of the condensate.

 

Or another reason for an oil catch can system

 

See, the only problem is that the catch can only solves one issue.... keeps oil vapors and such out of the gas and keeps it from entering the intercooler. The weep hole silves the other issue by keeping the built condensate in the intercooler from getting blown into spark plugs and blowing them out. Over the years, folks have seen enough condensate to actually hydrolock the engine. Definitely don't want to let this go.