I am new to this forum, so I hope I posted this correctly. I own a 2006 Ford F150 FX4 super crew 5.4 Liter V8 Triton motor. I had a misfire on cylinder 8 going up a hill, so I removed the spark plugs to replace them all and found that the top bar on the head of the spark plug had been burnt off or broke off. I replaced all of them and the problem was fixed for two weeks then number 6 did the same thing, so replaced all the coil over plugs and it was fine for a couple of days then number six misfired again so i swapped coil 6 with 7 to see if it was a bad coil or plug. It was good for a day then 6 went bad again so I replaced number 6 plug and then took it to high altitude and number 5 was misfiring and was loose and the head of the plug was completely burnt off. Im worried that the material from these plugs are going to cause huge damage. It also idles ruff like rumbles periodically like no noise but truck shakes. please if somebody can help i would appreciate it.

 

Have you considered taking it to a Ford dealer to have the professional techs look at it?

 

I have called all in my area and they told me that they would charge me to do the things I have already done...I was just seeing if somebody on this forum has had this happen to them...so I could start trouble shooting myself and not shoot in the dark...but thank you for the response..

 

Sounds as if you are running very lean. Do you have an after market intake or a tune on it?

 

No not that I know of...I bought it with 85,000 miles on it and it was all stock all that i have done since is a 3 inch Rancho lift and after market wheels, tires, and huge grill guard...

 

If it were mine, I would get it to a dealer and get it checked out.

 

Thanks, but I have read horror stories and class action lawsuits against ford for this flaw on this year and charging people 3 grand for spark plug changes..Once again I was seeing if anybody on this forum had the same issue with theres or knew where to start to save me time...I have talked to the ford dealers in my area and they all said the same thing that they dont know and would run a compression test which I am doing now and other stuff I'm capable of doing..I'm just frustrated that I have dumped A lot of money into this truck not knowing of this issue and recalls on 2005 plug problem..lesson learned....If someone still knows of anything I would appreciate it...

 

There is not recall on the plugs.

Have you checked the injectors?

The class actions lawsuits fizzled. It was not as big an issue as some played it up to be. There were a few that didn't know what to do and had to remove a head but most were able to change plugs for a reasonable amount.

 

Perhaps your boots are missing something or someone used the wrong coils. For them to be breaking off like that, - somethings not right with the hardware.

If I had to guess, - the coils were over tightened, or even washered up and over tightened. It's happened before. More than once in fact. People sometimes think the coils are suppose to be tight. Not so, they are suppose to be loose, - loose enough that you can move them by hand after torque. It's really a simple mistake, but that's what breaks them. They have to remain loose on the bushings because of engine vibration. What else could it be, The wrong socket, - not a plug socket.

Here's a pick, - what exactly is breaking, - the electrode under the terminal nut ??



I know I know NGK. Just want to make sure where it's breaking.

 

I took it to mean that the strap (ground electrode) had burned off, which sounds as it it's too lean.

 

Probably, - not sure tho.

 

Or Bosch plugs. Not sure if they make them for the 5.4's.

Plus if it's that lean it should throw a code, don'tcha think?

 

Nope, Bosch doesn't make plugs for the 3 valve, thank god.

 

would bad coils burn off centra electro

 

need help real bad this is my work truck