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Help Support Hardline Crawlers :
Ford 5.4 #2 cylinder misfire
- Thread starter muslcr71
- Start date
tommyswheelin
Well-Known Member
- Joined
- Dec 21, 2011
- Messages
- 230
Did he put the conductive gel on the plug when he installed the new pack? They sweat and get moisture in the sleeve
mikepotts
Well-Known Member
ive heared cam phasers are a NITEMARE on those... i dont know if its related though... that is on the 3 valve motors...
ibrokeit
Brock Higdon- Auburn, AL
My old 2006 was ran too long with a bad coil. Put a new coil on it and still misfired. New plugs and all was good.
mikepotts
Well-Known Member
i heared the plugs can break off in the head too so be careful... they actually have a tool to remove the broken portion.
ibrokeit
Brock Higdon- Auburn, AL
They 100% break off. And yes, they make a spark plug extraction tool. I think I had 3 out of 8 break.
FroggF350
Well-Known Member
My mother in laws did the same thing, it was the injector. Swap the #2 with another injector and see if the missfire moves, if so then thats your problem.
al1tonyota
Well-Known Member
Another prob they have besides the plugs breaking off is the early 3v injectors leak causing a hydro lock situation bending rod/s cranks and runs but miss on said cylinder caused by lack of compression! They replaced all that but not the plugs?
the reason they break is because the electrode housing sticks way down into the combustion chamber and it gets carbon build up on it. all you have to do it run a bunch of sea foam or something similar through the vacuum sytem or into the intake and clean the carbon a bunch and it will be fine. or for future reference change the plugs every 60k and you have no worries.
if you rule out injector and wiring and coil and plug, them do a cranking comp. test and running comp. test. ALSO, make sure the coil boot is in GREAT conditoin. fords are bad about archin from the boots, especaily if there is any sign of moisture. usually you can see carbon tracks if this is the case. but since it souds like there has already been some part swapping, go ahead and thwo one on. only 5$
grcthird
Birmingham, AL
If you do have a broken plug, Lisle and KD tools both make specific tools for extracting them. Also some good penetratig oil, like Kroil, on a warm engine will allow them to come out. You may have to be patient and loosen a little, then tighten a little, repeat, to get them out.
yea if it breaks atleast #2 is close to the front. wanna talk about a bad day, break #8 on an expidition!
you can also turn 1/4 turn and spray penatrating oil in, let sit for 30 minutes, another 1/4 turn, more oil, and so on. but DO NOT fill the hole up with pen. oil, use very little. it will seperate the porcalin from the part the sockets grips if you put to much in
you can also turn 1/4 turn and spray penatrating oil in, let sit for 30 minutes, another 1/4 turn, more oil, and so on. but DO NOT fill the hole up with pen. oil, use very little. it will seperate the porcalin from the part the sockets grips if you put to much in
grcthird
Birmingham, AL
Is #2 one of the cylinders that always gets coolant in it from the thermostat housing and causes a misfire? Or is that only a 4.6l thing? It's late and I can't remember.
ibrokeit
Brock Higdon- Auburn, AL
grcthird said:
I think that was just a 4.6 issue. Ahh, bringing back memories of the mach 1.
tommyswheelin
Well-Known Member
- Joined
- Dec 21, 2011
- Messages
- 230
We actually make those head at the plant I work at. Mexico used to make them and now we make them. But still at the end of the day it's a crap design and its a ford
