I am new here and have tried finding the answer to my question but cant find it completely answered anywhere so I will try this.

I have a 2005 F150 5.4 4x4 King Ranch 136,000 miles with a miss around 40-55 mph and surge at full throttle. I had plugs changed around 10, 000 miles ago and currently want to replace all the coils since I cant get it to throw a code and seems that I can buy and replace all 8 coils myself for less then Ford will charge to find which coil is bad and then labor to replace it. What I am now trying to figure out is, should I spend the $350 on 8 Motorcraft or would I be just as well served with a set of the 8 coils that sell for $200-250? I am considering any opinions and options of brand or best route to go about this repair... thanks

 

what plugs did you go with ?? this will answer your COP question...

 

Motorcraft plugs, does the symptoms sound like coils

 

With no cel.. Hard to say.. I would check the condition of your fuel pump driver module located under the spare tire..