I've done fresh Motorcraft plugs and fuel system cleaner. My miss/flutter at idle is still there. Considering replacing the coil packs since the originals have almost 100k miles on them anyway. I'm seeing that Motorcraft coils are $50 each and are listed under Rock Auto's "standard replacement" category. But they've got a "premium replacement" category with Delphi and Hitachi coils for $33 each and Denso for $36. Is there really a significant difference in quality with coil packs these days?

 

Truthfully, use Motorcraft. Fords do not like anything Electrical that is not Ford including the plugs that are an Aftermarket, IE not Ford or Motorcraft.
Know someone with a 3.5 EcoBoost in his F150, Plug changes on them between 30,000 to 50,000 miles, put other than Motorcraft in and started getting a misfire after about 7500 miles. Pull the plugs and they are fouled out already. Put motorcraft in and 15,000 later he pulled the one out that fouled the worst to check and still normal burn color.

 

In All My Years in Dealership Ford Parts I have Heard Plenty of Stories and Seen it in the Shop Where an X-Brand Part was The Culprit in Lots of Gremlins! The Worst were Duraspark Ignition Modules in the 70's & 80's! You Could Literally Feel the Weight Difference in the Module From Feather Light on the Aftermarket to a Hefty Chunk of Metal on the Ford. Brand X Would Fail Early, High Rpm Miss and Had Hard Cold Starting Issues! That's the Ones I Remember! Likely More!

KC

 

When it comes to coil packs, experience teaches you have two choices:

1 - You get OEM coil packs.

2 - You WISH you got OEM coil packs.

This is one of those things where aftermarket isn't the answer.

 

OK. I was just curious because I'd say there's a 98% chance that FoMoCo does not manufacture coil packs. It's almost a certainty that they outsource it, so if the company who actually makes them (my research says it is Denso) sells the same coil under their own brand for half the price, then there's no sense in spending the extra cash.

Thanks guys.

 

That may be so - provided that the ones Ford installs aren't manufactured to some particular Ford-only spec that isn't available directly from the original manufacturer.

 

If Denso is the manufacturer of the Ford/Motorcraft coil packs? then by all means purchase them from Denso if they're available at a lower price... However, If Denso is not the manufacturer, then make certain to purchase only authentic OEM Motorcraft coil packs... If on the other hand, Paris MkVI is correct in his post above regarding the specs being different? then I would rather spend the extra cash on the Motorcraft coil packs which are engineered specifically to Ford OEM specs...

 

I think when the weather warms up again I'll pop the engine covers off and see what brand markings and part numbers are on the existing ones. Might be interesting. I mean, we're talking $112 more for a set with the Motorcraft name on them.

 

Not just $112 more for the Motorcraft name, but also engineered specifically to Ford OEM specs

 

Are they? I guess that's the million dollar question.

They could sign an agreement with Denso to allow the Denso coils to be dropped into Motorcraft boxes. OR they could actually require Denso to use Ford specs for materials, design, and build. The consumer really has no way of knowing unless a guy buys both and disassembles them.

 

I Have Contacted Denso. Lets See If and What Kind of Answer We Get.

KC

 

Good idea, KC. It pays to still have all those contacts!

 

Contacting is one thing, responding is the key!

 

Ok Folks Here the Low Down,

Got an Email Back from Denso that Just Confirmed The Parts Interchange. Well We Needed More Than That So I Called Technical Hotline and got a Kindred Spirit in the Parts World Who Reminded Me of Me as Far As Going Down The Rabbit Hole For Answers.

It Seems When you are a Parts Supplier for So Many Things & Makes, You Gotta Dig For Answers. We Talked Shop for about 45 Minutes and I am Confident My Contact was Leaving No Stone Unturned. There Was No Page to go For with a story on the Part and a Simple Yes or No Answer. So After All the Searching it Seems we got a Backwards Answer.

As Per My Contact Denso Gets Sub Components from Ford to Produce an Oem Spec Coil.

KC

 

It appears the OP now has the answer he was expecting

 

Can you translate that for me? "Gets Sub components from Ford"? What exactly does that mean?

 

It Means While they May Have Standard Components Per Se Example {BOOT or SHELL} That Everybody in the Industry Uses Needed To Build a Coil They Have To Source a FORD Specific Component That Would Be Unique as Used in Motorcraft Coils Only That Ford Has the Rights To Produce or is Able To Supply. Bottom Line I Would Go Denso If Price Were a Factor. I dealt with people via phone for 3 Decades and can tell you my Contact Really Dug for Answers & Inspired Confidence in the Product!

Hope That Helps!

KC

 

Thanks.