2006 F150 supercrew 5.4l 85,000. truck runs great and still gets good milage but at WOT pulling out from stop I get a hesitation and almost a miss and then it goes thru powerband smoothly. No engine lights coming on and seems like it is running fine.just wondering if anyone has had this issue going in for service and want to make sure I am being told what the possible causes could be. thanks

 

I am having the exact same problem on the same truck as your but mine has 91000 mi, I just started a thread a couple days ago on this and I have gotten a few responses and I have a few people asking me questions about it to try and diagnose it. Check out my thread called rev limiter / elec issue...

 

Hey guys,

I have a 06 XLT 4x4 and had a similar problem.

Here's what I did to get rid of the miss.

1) Sparkplugs (MOTORCRAFT ONLY)
2) COP's (Global Automotive off of Ebay) - ~ $120
3) Fuel Filter
4) Air Filter
5) Cleaned where the intake tube goes into the fender
6) Cleaned Throttle Body https://www.f150online.com/forums/ar...ttle-body.html

and I haven't had any problems with hesitation yet.

Good Luck!

-M

 

I have done all of this but COPs and plugs.....I am not looking forward to the plug change out, did you have any broken plugs?

 

I didn't have any issues. Here was my process.

1) warmed up the truck a little, NOT HOT!!! just warm.
2) did one at a time
3) Pulled off the COP
4) Gently removed the plug
5) pressed the COP onto the loose plug to pull it out of the hole
6) put in the new plug NO ANTI-SEIZE!
7) Dielectric grease on the COP Boot
8) Install the COP
9) Repeat for all 8.

Just remember to get the truck warm, the heat helps to loosen the plugs a little and makes them easy to remove.

Just take your time, even spray a little penetrating oil or PB Blaster or somethign on teh plugs for a few minutes before you try to loosen the plugs.

nice and easy is the game plan and you shouldn't have any problems.

I highly suggest replacing the COP's with the global automotive ones, they are only around $100 for a set of 8 and they are all OEM spec so you shouldn't have any problems, also they have a lifetime warranty on them I believe.

If you have any more questions please do not hesitate to contact me!

Good Luck and keep us posted!!!

-M

 

Alright just purchased the plugs from rock auto..by far the cheapest place I found...going to be attempting this in a couple weeks...I see you emphasized NO ANTI SEIZE? 90% of all of the posts about how to change the plugs say to use a nickel based anti sieze...why are you saying no? I don't have any reason to think one or the other is the right way since I have not attemped to change the plugs on this motor before....FYI...I am not changing out the COPs right now but should I still grease them?

 

I've read that if you use anti seize on the plugs that it increases the chances of the loosening or blowing out. If you do a search on spark plug blowout you can get some more information on it.

And yes, always use some dielectric grease on the sparkplug boots...

 

^ Technical Article Contributor??
This may only occur only, if you apply anti-seize to the threads, in which the TSB clearly states NOT to. This will not happen at all if you torque the spark plugs higher than recommended, but I won't get into that.

OP - You need to use nickle anti-seize on the ground electrode shield to prevent carbon from sticking to them. This will greatly increase the ease of removal the next time!

 

You are getting different engines confused. On the old 4.6 and 5.4 2V prior to late 2003, the heads only have 4 threads, and use of antiseize can contribute to plug blowout. On the 5.4 3V, use of nickel antiseize on the ground sleeve (NOT the threads) is MANDATORY.

 

^^^^^x2.
The lack of threads and blowout problem was the 2v 5.4L.
You both have the 3v which has the 2 piece broken plug issues. And like GLC said, Mandatory that you use nickel anti-seize on the ground sleeve, or you'll have a lot of fun on the next change, guaranteed they will break off in a bad way.