It's that time again - F150 Spark Plugs

[November Sierra]

This weekend I plan on changing my coils and plugs again. I'm not savvy in the ways of the one piece plugs and have read they're not the best. Everything I've read about them being shoddy was from about decade or so ago. Is this still the case with them or should I stick with the Motorcraft ones I've been using?

 

[Chatsworth]

Is it running bad?
I put over 200,000 miles on a F150 before changing them.

 

[DADI03]

Older Fords seem to do fine on aftermarket parts. Not sure about the newer ones.

 

[November Sierra]

Is it running bad?
I put over 200,000 miles on a F150 before changing them.

Its not running bad, knock on wood, but it's been about 100k since I last changed them. It's an 07 model in case anyone is wondering.

 

[gh1950]

Its not running bad, knock on wood, but it's been about 100k since I last changed them. It's an 07 model in case anyone is wondering.

Leave them alone.

You should easily get 150,000 miles from a set.

 

[NewLeaf]

Older Fords seem to do fine on aftermarket parts. Not sure about the newer ones.

On the newer ones (in my little experience) the coil packs are expensive and the longer you put off changing the plugs the harder it is on the coil packs. We bought 2 new vehicles in 09 (same model) , I did servicing on 1 and this is the conclusion i came to

 

[November Sierra]

Leave them alone.

You should easily get 150,000 miles from a set.

You sure, man? I'm pushing 300k on this engine. I'm no mechanic but I would think this thing should get maintenance when it can

 

[MrJim]

If it were mine I would change them. I sure don’t think it would hurt anything. Not sure I would change the coil packs if it’s running ok ok but plugs yes. And should not cost much.

 

[PoliceInterceptor]

Replace with Motorcraft Plugs, Install new Boots on Coils "Amazon has OEM Cheap" and use dielectric grease in New Boots

 

[Lobo1]

Chances are you have already got this job done but I will give you and other members this information for future use. Several days BEFORE you start, put some GOOD fuel system cleaner in your tank. This will break loose and carbon build up on the extended shank on these spark plugs..The carbon build up is a big factor in causing the plugs to separate. The plugs were originally crimped together instead of tig welded. Get the engine good and warm before removing the spark plugs. They come loose much easier this way. If you hear a squeaking sound when turning the plug, STOP!!!! Turn the plug back and forth a half round or so a few times. Shoot some penetrating oil down at the threads and give enough time for it to work in. (I usually do another plug or two then go back to that one). NOTE****** On the passenger side rear plug (#4), if you take a few minutes to disconnect the computer connectors and remove the computer, you get easy access to that plug. Make sure to disconnect the positive battery clamp first. When you get ready to install the new MOTORCRAFT plugs, put a coat of NICKEL BASED anti seize on the threads..Copper based will not hold up to the intense heat. DO NOT get the anti seize on the igniter tip. It will burn off and screw up your O2 sensors, ( ask me how I know). I have replaced several dozen sets of these spark plugs and have not broken one yet. But I ALWAYS expect one to break every time I do a set. Hope this helps and if you already have done this, maybe it will help someone else in the future.