I don't know, but I wouldn't listen to that crap. The owner's manual isn't the one forking out the dough to fix the truck, and he ain't busting his knuckles to change that back COP either! Besides, you lose every bit of efficiency you would ever hope to gain by washing it when its running on 7 cylinders.

 

my 5.4 is doing the same thing and have replaced all cop's and plugs with oem and it still does it will a vacuum leak make it miss.

 

Is your check engine light on? An injector will make it miss as well as internal engine problems like a chiped valve. A vacuum leak big enough to make it run rough would almost certainly throw a code. Any missfire should to.

 

Yes it can.

 

Already did.....Not sure where the moisture is coming from though????

 

I am somewhat confused by your statement regarding dielectric grease.

You say you put it all over the boots but you clean off the spring where it goes into the top of the plug and do not put grease on the spring, I thought the grease was good for all electrical connections Batterys, bulbs, electrical parts, ETC.

I put it mainly on the springs am I wrong???

Please advise

 

Hint: it's a really good insulator, moisture barrier, and extremely non-conductive

 

"An effective dielectric typically contains polar molecules that reorient in external electric field. Generalizing this, any insulating substance can be called a dielectric"

You DO NOT want any insulating material on any electrical connection. The one place you don't want it is on the springs in contact with the plug!

 

Thankyou AZTriton for your excellent explaination and not laughing.

MGDfan Your answer was condisending and downright mean it was my first post and for a Senoir member to answer like that and laugh is uncalled for. We all have stupid things comeup don't judge me by one post I know more than you think MR. 4,000 some posts.
It's esy to build up the post numbers throwing out wise cracks.

 

:Read all my posts, have you? If not - reserve judgement

Sorry you chose to interpret it this way - was not intended to be such. Okay?

It was, however, 100% accurate


AZ - BTW, Wiki's, out of context, can be somewhat misleading. The properties to which you refer are actually for dielectrics used in capacitors. Some are inert (ceramics, tantalums) while some actually rely on the polar properites mentioned to establish the very thin film that gives electrolytics their high capacitance values - the fluid electrolyte itself. The silicon-based dielectric grease in topic is actually inert & stable, even at very high temperatures.

Just sayin' ...

guys

 

I had the same problem, swapped the coil off the cylinder that was missing, still missed. Test the coil connector on all cylinders while the engine was running. All tested fine, so I ordered a set of reman injectors. Still missed intermittantly. So I replaced all the plugs, some were alittle corroded(not on the cylinder that I got the code off). In the end, I ended up replacing 2 coils, due to one on the cylinder with the code, and one I leaned on and broke the mounting tab. My miss went away with the new coil.

If I were you, like others have stated above, try a new coil. Chances are it will fix the problem as your misfire sounds the same as what mine was.

 

Thanks for the answers, I am not trying to hijack the thread but I would like to add something.
Got a code misfire on #5 replaced plug with OEM plug, ran truck a couple of drive times on comes the light, again misfire on #5 I go buy a new cop, take the original cop out, run OHM readings on it and they are as specifed, installed the new cop, erased codes, ran drive cycles no light drives like a raped ape, took the old cop to workshop pulled it apart and Wa La the metal contact coming out of the coil was green and had some build up on it.

The point is the old COP is proably still good just needs a good cleaning.

Good to be chatting with you Blue oval owners.

 

What! - His answer was direct and to the point. Doing that in as few words takes a little talent.

Maybe you have trouble with that form of our dialect. - You use it to house/ protect your connection, but you want to keep it away from the contact point.

I know , I am a meany straight up Oh, and look @ my posts , - - sooo, -refer to me as MR. 15,000 or whatever makes you comfortable when you cry.

 

ZBREW
You Seniors laugh alot might have to go to a Doctor to be evalua
ted.

OH! I did see you posted over 15K you didn't have to tell me that MR EGO. And it would take alot more than you got to make me cry.

I might cry though if you Seniors all gang up on me, I might have to ride around in my F150 and listen to CDs.

Happy New Year all you Ford Lovers

 

Happy New Year