With 150k miles on it, should I be looking at replacing the 8 coils complete set, or just the 8 boots and springs... Obviously the boots and springs are cheaper but If it is time to replace the coils then that would be the better option

 

I bought a coil for my ecoboost from CarQuest. Comparing it to the old coil it was replacing it was very obvious it was the same part. The CarQuest part was clearly machined/dremeled to remove the Ford identification marks.

 

I can certainly understand that. Once upon a time I was helping out a friend with limited funds repair their van, after pulling the fuel tank to replace the fuel pump a 3rd time with after market parts. I told them I can't afford to keep doing this for free and good luck with the last one I installed.
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Ok, so update

I bought replacement boots/springs, then ended up ordering MSD Street fire full coils from summit... Planned on returning the boots/springs and going with the full coils since they were only $152 shipped. Well the coils arrived and they accidentally shipped me the ones for the 2 valve 5.4 instead of the 3v, I have a 200 mile drive tomorrow to my shooting competition so I swapped all the boots and springs on the stock coils, idles smoother, seems to run strong, we will see how the mpg is tomorrow after 200 miles of freeway.

I still am wondering though if after 150k miles I should be looking at changing the coils... Or are the boots and springs enough? Thoughts?

So far I have done:
k&n drop in filter
Plugs
New boots and springs on old plugs
Seafoam in tank

I think that is About it for the easy small stuff besides a tuner in an attempt to get it over 10.5 mpg

Anything else, should I do the coils or stick as it

 

Coils either work or they fail... replace your plugs .. boots and springs.. clean the throttle body and Maf sensor..

 

so what happened?

 

you're asking for a response on a post that is 6 years ago, maybe he's still around, but don't feel too bad if you don't get an answer.

 

Oh I won’t.

im just debating on doing the boots as well most likely gonna do the whole set of coil as 1 has already failed. Weird thing is it bench tested fine but would fail under load.