5.4L Coil Pack
 

Just before my warrentee ran out I had a bad miss in one of the cylinders, followeed shortly thereafter by the "Check Engine" light. Dealership replaces coil pack and plug under warrentee.

Funny thing happened around 2x the warentee milage. I just started getting this miss in one of the cylinders.

Is there any way to easily test for the failed coil pack. Does anyone know the Ford Service # for it. Better still, is this even worth replaceing myself.

5.4L Coil Pack
 

The coil packs are easy to replace - except for the back cylinders where it is a bear to get to them. A code reader would help you out a bunch since you could find the pack that was bad.

5.4L Coil Pack
 

I have the same problem with my 97f150 2wd, 4.2Liter.....I would like any more information anyone can provide on fixing it myself...

5.4L Coil Pack
 

One little bolt holds that coil pack in place. Once you know which plug/pack it is, they are very easy to replace. If you have a doubt try the front one on the right side (5.4L). You will need a air compressor. You must blow out the hole where the plug sits to make sure no dirt or rocks fall into the engine.

5.4L Coil Pack
 

Had this happen on my van. Code indicated #7 wasn't firing. Thought it might be a bad connection so I cleaned and re-connected the coil. Ran fine for a week, then came back. This time I swapped #7 and #5 to see if the problem moved to #5. That was almost a year ago and the miss never returned.:-X10

5.4L Coil Pack
 

I have a 2001 ford expeidition. what is the best coil pick to use?

ok thanks so if one is bad should i do just that one or all off them

The link above is a great deal and I run them on my truck.
It was recommended to me to get the set for the V10 so you have 2 extras when you buy them.
I'm glad I did because 1 was bad out of the 8 I put on. Instead of messing with sending one back I just put one of the extras on and now I still have one extra good one for another time.

Has anyone bothered to try the MSD or Accel coil packs for the 5.4? just wondering if they are any better?

Any better then what? :-huh

There no better then the stock Motorcraft!
Same as the cheep ebay ones basically. Just with more hype/BS...lol

I agree, the Accels are painfully bad, the MSDs are ok, but remember, they can't be better if they are cheaper. In coils, you get what you pay for. I would pass on the eBay ones, and replace the one(s) that have failed with OE Motorcraft coils.

You should try first what I did. But for COIL PACK not COIL OVER PLUG.

When you check your codes at the local big box parts store (or on your own scanner) the last number of the misfire code will be the cylinder. The back two are a PITA as mentioned, but the others are remove the one 8-10mm bolt (can't recall) unplug the electrical hook up, pull it off and put a new one on.