Hello everyone I need a little help. I have a 2006 F150 4x4 with the 5.4L (not Flexfuel) The truck has 74000 miles on it and within the last couple of months I have noticed the truck jerking. There is no codes or CEL I can make it jerk when I am in overdrive doing 45 to 50 MPH and accerlate slowly. I have done the following to my knowledge of what could be causing it. I changed the oil, air filter, and fuel filter. I removed the throttle body and cleaned it completly (with throttle body cleaner) and even replaced the o-ring underneath. There was some carbon build up. Plus I removed the MAF sensor carfully and cleaned it with MAF cleaner. Talking to some friends they sugguest changing the plugs and also the coils. Whats your opinion???

 

is the jurking comin from the enigine

 

Pretty postive it is.

 

Sounds like a typical low grade misfire. Right after the shift into OD... starts to buck a bit with light throttle..

Original plugs? I would guess cop's. If you can't get the CEL to flash or set a dtc by continuing to keep it misfiring, it will be tough to figure out which cylinder it is. But definitely sounds like it's either bad cop or plug. Which one? don't know... so if it were me, Id replace them all.

 

It does have the original plugs and cop's. Stop by the ford dealer and they wanted $650.00 to replace the plugs. Sounds expensive to me so I figure I would ask here first. Thinks I should replace the cop first to see if this solves the problem??? If so is it hard to do so?

 

I had the same problem, so last weekend I changed the plugs and the cop's and the problem is now gone. I did break 5 of the 8 plugs but the Lisle 65600 tool did the trick. I was quoted $500 dollars plus $100 for each broken plug, so it would have cost me over a $1000 to have it done. Definitely worth the $600+ I saved to do it myself. Only problem I have is that after changing the plugs it now intermittently stalls when coming to a stop. I think I may have a loose vacuum line and will check this weekend.

 

mine did the same thing you get down on it runs like a champ and when you cruse with light throttle starts bucking mine was ignition module but mine iss 99 f150 w/5.4 but i put a load on the motor and pulled it up a hill at 47ish mph and let that sucker buck. check engine light came on it was misfire on cyliner no.7 bam prob solved but might not be the case. hope my experiance helped you...

 

I would go over anything that you disconnected or moved out of the way when you were doing the change. Something may not have gone back together all the way or was forgotten.

It really depends how mechanically inclined you are. To change the cop's, I would say if done right, should take a basic mechanic an hour maybe. Making sure to clean the plug wells out, properly grease the new cop boots etc.. The plugs would be a different story.... but it would kill me to spend 600-1000 on a plug change. I like to be familiar with my vehicles anyways so would opt to do it myself, no matter how long it took. Even if It took me the whole weekend, it's worth saving that extra money. But then again, like I said, it's a whole different story. You need to research and be prepared for what is to come with the broken plugs and how to remove them correctly and safely. All the information you need and then some is right here on this site.

If you have removed the TB and cleaned it, along with the other things you mentioned, I think you can do it no problem. It's all unfamiliar, and sometimes intimidating hearing some of the stories, but each are different. Some have had success and even other who have not had much luck and broke 7-8 plugs still the end result was a finished product and money saved.

 

@Toyz Thanks man, thats what I figured. Plan on changing my front shocks this weekend so I'll get under the hood while I'm at it.

 

Did you have the battery disconnected when you did the work? If not, it may need to be reset.

 

I had the same exact problem you are describing. Put all new plugs and COPs in last weekend, now it runs perfect. All new plugs and COP's cost me $180 total.

 

So I have come to a conclusion that I need to go ahead and replace the plugs and cops. Just wondering what plugs and cops you would recommend installing??? Should I go with motorcraft parts or aftermarket? If so please give part number if available. Thanks and wish me luck :-)

 

@Toyz I had the battery disconnected since I had to remove the computer and bracket holding it in order to get to the farthest plug on the passenger side. Do you think I should reset it again?

 

Motorcraft plugs and cops from EBay...I think the seller everyone on here uses and reccomends is global but someone will confirm that for you. MAke sure to use dielectric grease on the new coils...I just had a misfire after the rain started and it's because there wasn't enough dielectric grease and I think moisture got up inside and was messing with it.

 

The factory cops on the 3V seldom fail. Change the plugs first, at 74k they are due.