Ford Super Duty (1999-2016) :: 2006 F250 Misfire - Coolant In Spark Plug Well #8?
Apr 6, 2016
I have a 2006 F250 5.4L. I was getting a noticeable misfire after not driving the truck for a while. Mode 6 revealed that cylinder #8 was misfiring.
I took off the coil/boot and there was coolant on the tip of the boot and some at the bottom of the spark plug well.
I cleaned everything up and put everything back together and that took care of that problem when I started the car. I also stuck a wad of paper towel by the intake manifold nearest spark plug number 8 and tightened the manifold bolts down a little. Some of them were not as tight as others.
I went back today and started the vehicle and it has the same problem again!
I took a look at the paper towel and it was totally dry! There is no coolant around the top of the spark plug well - only in the bottom of it. Where is this coolant even coming from? There are no coolant lines near cylinder #8. Is this a head gasket leak?
I have taken a look at the head gasket and that doesn't seem possible since the head gasket does not seal around the spark plug well at all as far as I can tell.
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I have an 03 F250 5.4L
Driving down the highway today, I notice my truck was jerking forward a little, hard to notice almost felt like I was hitting very small pot holes. I revved up a little to see if I could notice any noises and I got a loud pop. after the pop, got a noise like an exhaust leak so I pulled off to the side of the highway and popped the hood (engine still running). Noticed the noise coming from the passenger side most forward spark plug. Then noticed the part that the coil attaches too had broke off from its bracket and was unseated, shut off the engine and pulled it out to find the coil cover had melted to the coil.
The spark plug inside was moving freely so I took it out thinking it stripped from the header. Come to find that the plug had actually separated from its threading completely so just the core part of the plug had shot out from the cylinder, the threading and socket attachment portion still fully attached. I installed a new spark plug and new coil harness and coil. Seems to be running as good as new now. Is there more to this than a simple blown plug that I need to worry about?
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2001 Ford F350 V10, 220K in crap condition
First of all on the left side 2 of the coils were so withered the rubber separated from the bolt and were loose. Without any tools I was able to remove 2 coils. Typically there is the hole and several inches inside hole is where the spark plug sits.
On cylinder 4 the spark plug is on a funny angle and is level with the hole or possibly poking up above the hole. Tried sticking the ignition coil over the spark plug but it wasn't correct. Leaving it alone until my cousin can take a look. Spark plug was tight but I didn't put a ratchet on it.
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