I have a 2004 Ford F-150 5.4 triton and i recently changed out the spark plugs and ignition coils I ran into my last spark plug and I’m having issues with the 9/16 socket catching onto the plug I tried going a size smaller and using a 5/8 socket as well nothing seems to work so now I’m thinking the spark plug is broken so I took a picture I can’t really tell if it is or not can you guys please give me any suggestions I also bought a oem extraction tool kit just in case

 

14mm is very close to a 9/16 so you could try that for giggles.
it's hard to tell from your photo but almost looks like there is something in the hole like maybe a piece of rubber from the bottom of an ignition coil boot? That would keep you from being able to get good purchase on the plug.

Try sticking a skinny flat screwdriver down the side of the hole and see if there is any "squish" when you push down on the side of the plug.
The other thing you can do is put the socket down in onto one of the holes you have already replaced the plug in and mark it where it sits flush with the edge of the hole and see if it goes down to the same depth in the trouble hole.

 

Can you reach in there with a tool or something and wiggle it around? If you can't wiggle it, I would suspect the plug not to be broken.

As pointed out above, I wonder if there is something in the hole. I didn't pick up on that but it seems the hex should be visible?
Can needle nose fit in there? You of course need to be really careful with an attempt to wiggle it so you don't actually break it if it's not broken now.
Maybe swing by the parts store or some place to pick up a pic -if it is rubber, the pick can hook in and extract it.

Good luck, doesn't sound fun!

 

You might be right that makes a lot of sense …so tomorrow morning I will try these methods I never though about the rubber boot being stuck onto the spark plug so I will try and stick something down there in the morning ..thanks a lot for that advice !

 

I haven’t stuck anything to move it around but now that you mentioned it I will do this first thing in the morning and let u know how it come out thanks alot brother !

 

Didn’t mean to quote I’m thinking that’s the only way to reply lol

 

Question-
Did the other spark plug wells look like the one in your picture? There is an awful lot of soot down that well almost like the plug was not tight and combustion gases were leaking by the threads. Maybe the boot melted? What did the COP boot look like?

 

@Jimboy Im going to check this morning and take a look at the other spark plugs I’ve replaced and compare it Now that you guys have suggested it I’m hoping that’s the case I do remember one of the old ignition coils being broke in half while being remove so I should get some good news off you guys feedback here in a sec

 

I'd also blow it out with compressed air. Maybe dirt and crap as well in there.

 

@16IngotFX4 @ReaperHWK @Jimboy@needsmoarturbo
Here’s the updated picture this morning I just spray the well down with some brake cleaner and stuck a cloth down there in letting it sit and dry so I can clean the oil up around it …afterwards I’m planning to use a air compressor to shoot some air down there… any other more suggestions guys will be helpful thanks