I have read countless threads on this but all of them to late. I don't know the firing order of the spark plug that blew but it was the on the driver's side, 3rd one back. I am very disheartened to see all of the stories about this sparkplug blow out epidemic and Ford not doing a thing to resolve the situation. I have read more than 20 incidents about this occurence. I wonder how many more people have had this problem who haven't posted. Just for the record I drive a Ford f150 with a 4.6L 4x4. I don't know if anyone is tallying these things up, but if you are, here is another one.

 

I feel your pain. Been there done that #3 cylinder . Napa has a kit for it though .

 

I have been looking for for a while now, to see if anyone with a 4.6 ever blew a plug. Sorry to see you did. It's a painful situation. I am suppose to close a deal on a 2000 mint condition 4.6 today. I've been having second thoughts about it, and I think I've made up my mind. The truck may be mint but the motor will always be suspect. Hope everything works out for you......ranger910

 

just think how many hundreds of thousands of 4.6 /5.4 have been produced.the plug problem is not that common. even if it does blow one which is a big IF. napa has the kit to fix it for 60$.

 

Is this kit hard to put in. I am not as mechanically inclined as I would like to be. Do you think my mechanic would be able to install it?

Thanks for all of your answers
Jeremy

 

any experienced mechanic can install it no problem.

 

I experienced one last night on the way home from work. It happened to a 2003 4.6 liter engine. I was under the impression that the head design was re-engineered (to fix this known issue) before the 2003 model went into production.

 

I remember reading from a post in this engines forum that they changed them in 03 , but not before that . Sometime in 03 - someone had asked that before and he had to look at the numbers on the heads to see if he had the updated ones.