it could be either, coworker had a hole in his boot that was arcing out. or the coil could just be bad and not get there at all.

 

Well i'm another one to join the club of the misfire. So far i've changed plugs and boots/springs, bought a new coil pack and started swapping it around which cylinder is #6. Thanks

 

that would be the second one from the front on the drivers side.

 

Thanks. Does anybody know the TSB #for these symptoms??

 

After reading this entire post, I Thought I would share some of my past experiances with the 5.4 engine.

I have a Fleet of E350s with the 5.4, Thay have way over the normal amount of running hours on them. Lots of Idleing and heat under the hood on them.

1. Sign of a bad/plugged fuel filter: Going from a stop at WOT, it starts off fine building up speed, but when the engine starts to hit the higher end of the RPM band (Getting close to shifting 1-2) Roaring like crazy but quits picking up speed. Sometimes it wont even shift till u take the foot of the accelarator. Doing this enought will set of a lean code to both front oxygen sensors and set a light if it happens too many times.

2. Signs of 1 Bad/Failing Coil - on - plugs: Surging at highway speeds / miss while under light load (lugging) usually in OD. -
The computer has a very hard time finding bad coils at either end of the block.

The VANs popular bad coil is number 8. This is due to heat build up in the design of the van.

All of you with bad coils take a look at the boot. Is it hugging the spring at the tip that goes onto the sparkplug, or did it expand due to heat?

The heat makes the tip expand and now the boot looses its water tight seal. After time Moisture / Humidity gets in the boot. Then you drive around a tad. Well that moisture gets super heated and turns into steam and rises. Rises into the coil above it. Then it starts to play havack to the coil. Random misses, might do it some days, might not others. Finally it will totally fail. And when it totally fails is when the onboard computer should pick up on it.

Not all code readers will pick up pending codes. I know the A--- Zone ACTRO- code reader and scanner doesnt pick up on all ford codes.

Also if the engine starts running fine for just a little bit, it will reset the pending misfire code. The best thing you can do to determine the bad one is to lug the engine alot. Make it buck alot for 10-20 miles or so, then check for codes.

If the computer detects more that 1 misfire cylinder, it will set a random misfire code, then tell you the worst offending cylinder. Drive it long enough and you will set the second or third. Yes it is possible to lose more that one coil at the same time.

For example:
Coming home for Thanksgiving, I noticed the occasional miss. I knew i had one going south. Well i took the next week off, so my van set parked. Well every day it rained(Lovely Ohio Weather) of my vacation. I went out to start it up on my first day back to work. It started but was shaking at idle. Still only pulled up #1 missing. Thought i would drive into town and pick up a new ONE. After trying to get out on the main Road i couldnt get about 35mph and the van was shaking violently. I turned around and went home. Then I pulled up the random misfire code and #1, #8 missing. Drove my pickup into town and pick up 2 new coil on plugs. Replaced them and reset the computer. Drove around the block, but noticed a light surge and a(once a mile) miss. Even though it was minor the computer cought it and showed #3 bad. Picked up the 3rd coil and installed it. Purred like a kitten. Drove like a dream ever since. After doing some research i found that I just replaced 3 coils that had been replaced the year before. 2000 miles since, no problems.

A--- Zone stock the coils at around 47.99 now-a-days. Pricy but cheaper than F-rd. Also they are W-lls and for some reason already have the F-rd Part # Stamped on them.

Cylinder Order

Passenger side front of engine TO rear passenger side #1, #2,#3,#4.

Driver side front of engine TO rear Driver side #5,#6,#7,#8.

 

Hey Guys

I've had the same problem 2000 F150 CC 5.4 auto 4x4 with 84000 miles.

After a tune up the truck started to stumble at 45mph turning 1300 RPM. Gas mileage decreased to 13.5-14.00 mpg from 16.5-17.00 mpg. Never threw any codes.

After reading every thread about this problem I bought a set of 8 COPs on Ebay for $138.00.

I changed out COP 1-6 the afternoon they came in the mail. (1-6 are the easy ones!). It got dark so I had to stop. Test drove the truck and still had the stumble.

The next morning I changed out 7 and 8. While changing out the #7 COP I had to disconnect the vacumn hose line that runs just above #7 COP. (This vacumn hose comes off the EGR tube and goes to a small manifold located underneath the powersteering fluid resevoir) I noticed the end of the hose was split. I taped off the hose when I reinstalled it.

After changing out #7 & #8 and taping off the vacumn hose the truck runs fine. No more stumble. Gas mileage (after 125 miles checked at 16.00 mpg (80 mph interstate driving).

I checked the primary and secondary resistance of each old coil and they all checked good.

I'm tempted to pull the tape of that vacumn line hose and to see if the stumble returns.

Anyway, this forum is a great source of info. Thanks to everyone for their posts.

Check out EBAY for those coil packs. The ones I got were off a new mustang 4.6. Had the same numbers as the COPs on my truck. Local FORD delaer was $108.00 per COP. Advance Auto was $49.00.

Happy New Year!