megladon
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• Yuma, AZ, USA |
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• Registered on 5/9/2005 |
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• 18 posts |
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 Posted:2/4/2006 03:58 |
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My 2000 w/V10 has over 150K on the clock and started an occasional miss at idle. Once the truck warmed up and got up to speed I no longer noticed it. Every once in a while it would sputter a bit at idle, say at stop light, but then smooth out and run and sound fine. Not knowing the history of the maintenance before 140K, I decided to replace the plugs. After carefull research I chose the Autolite Double Platinums and all were gapped to .054 inch. I started with driver side as it was the most accessible. I noticed that the coil packs on cylinders 9 and 10 didn't have the same yellow Motorcraft sticker, but a black sticker with some numbers on them. I made my way to the passenger side started from front to back. When I got to the number 4 cylinder, I couldn't get the socket over the spark plug. I tried different sockets and extensions and could not get the socket to bite. So, after three hours of balancing on a chair, barefoot and in my boxers, I gave up. The front end of the truck was inside my garage so I had to back it up to close the door. When I started it up it sounded (and felt) like it was running on about 7 cylinders. It idled rough and going down the road, it never smoothed out. I'm assuming that the coil packs on 9 and 10 are not stock. I've read that any aftermarket COP's are basically junk and that only Motorcraft should be used. Would running 8 fresh plugs and 2 old ones make it run rough? The 8 plugs I managed to remove all looked the same, ashy white. Would hooking up to any engine diagnostic computer pinpoint the cylinder(s) that are misfiring or would I need to take this to the dealer. I really hope not, as our local dealer service center is a notorious rip off. The nearest Ford dealer with good reputation is about 2 1/2 hours away. What could I have done to make miss worse???? Sorry this was so long, just a lot of info to include. |
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monsta
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• The Big Island, HI, USA |
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• Registered on 1/5/2002 |
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• 1,056 posts |
• 2 Vehicles
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 Posted:2/4/2006 13:14 |
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| Quote: | | After carefull research I chose the Autolite Double Platinums and all were gapped to .054 inch. .............What could I have done to make miss worse???? |
The plug choice probably. Seems these engines prefer the stock plug over anything else.
I would also check and double check all the COP connections to make sure you didn't accidentially loosen them up.
Did you put dialetic grease on the boots?
The stock COPs are fine but are know to go bad....just like anything else. You can do a resistance test to see if they are good or not. Start with this thread.
http://www.ford-trucks.com/forums/showthread.php?t=449356
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megladon
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• Yuma, AZ, USA |
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• Registered on 5/9/2005 |
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• 18 posts |
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Posted:2/5/2006 02:32 |
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Thanks for the input. I've read several places that the double plats were a good choice...hope I didn't blow $40.
So, with a multi meter check between the spring and each of the terminals on the harness side. That string stated 4k-10k is good. At what point will it not be? Say if it reads 2k or 12k . Also stated: If you measure B+ to ground and are getting a low reading |
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megladon
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• Yuma, AZ, USA |
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• Registered on 5/9/2005 |
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• 18 posts |
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Posted:2/5/2006 02:44 |
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(Sorry for some unknown reason it would show the rest of my post....)
continued..
less than 1 ohm, its bad. Then the next reply states that if measures .3 to .8 it good. Which is it?
Thanks for the info!!! |
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megladon
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• Yuma, AZ, USA |
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• Registered on 5/9/2005 |
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• 18 posts |
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 Posted:2/6/2006 15:46 |
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OK, I'm an IDIOT!!! While testing my COP's I discovered I left the number three cylinder unplugged. I did that so that I could reach the number four cylinder easier and forgot to plug it back. I finished the tests (all were fine) and cranked her up. She purred like a kitten at idle and growled like a lion at 4k. Goes to show, you (or at least "I") shouldn't work on her while sleep deprived at 2AM!!! |
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monsta
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• The Big Island, HI, USA |
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• Registered on 1/5/2002 |
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• 1,056 posts |
• 2 Vehicles
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Posted:2/6/2006 16:50 |
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| Quote: | | OK, I'm an IDIOT!!! While testing my COP's I discovered I left the number three cylinder unplugged. |
Excellent! Now you see why Ford doesn't make a V9. They run like crap!! 
Glad it was an easy fix. 
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nhoj
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• Hanover, PA, USA |
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• Registered on 1/9/2006 |
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• 37 posts |
• 1 Vehicle
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Posted:2/9/2006 05:44 |
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I'm new to the forum but have some info you may, or may not, appreciate. I took my X to the dealer to locate a miss. They found #1 coil pack and plug bad. $250.00 later it was running great. A week later, it was missing again. I was not about to take it to the dealer again. I found after market coil packs on e-bay (new) for $18.00 each. Yes, this is not a misprint. I was aprehensive at first and asked the guy several questions. They are supposed to be manufactured be the same company that manufactures Motorcraft. long story short. After replacing the nine remaining coil packs and Motorcraft plugs, it runs like new.
John
Contact
Ford F150 Expedition Excursion Lincoln Ignition Coil
Seller: aznmikelee (myko85@gmail.com)
01' Excursion V10 4X4
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supercrewjohn
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• Monrovia, CA, USA |
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• Registered on 6/13/2005 |
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• 45 posts |
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Posted:2/9/2006 16:49 |
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On the topic of coil packs. How often should these be replaced, and are they a warranty item? What is the replacement interval on the spark plugs?
One thing I have noticed, is that my v10 does idle a little rough when it first starts up. It has done this from day 1 and know it has 22,000 and this has remained the same. The F150 with the 5.4 used to blow out a coil pack about every 15000 miles after I reached 60K |
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rozett
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• Limington, ME, USA |
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• Registered on 1/10/2003 |
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• 163 posts |
• 1 Vehicle
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Posted:2/9/2006 18:25 |
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The replacement interval for the plugs is 100K miles. I don't think there is any maintenance replacement of the coils. It's no different than the coils on older cars.... replace when they go bad.
//bruce
2000 Excursion Limited V10 4x4
ART brakes, Rancho RSX shocks, Hellwig rear sway bar, SD grille, V10 badges, Sylvania Silverstars, clear corners, and Bridgestone Dueler A/T REVO 285s. |
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nhoj
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• Hanover, PA, USA |
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• Registered on 1/9/2006 |
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• 37 posts |
• 1 Vehicle
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Posted:2/11/2006 11:04 |
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I first found out at least one of my coils was bad when after washing the engine it ran terrible. That's when the dealer told me how over time they can develop cracks which you can't see but moisture will find. Also, be sure to yse dialectric grease in the boot when replacing. The plug should be replace when replacing a coil pack. 
John
01' Excursion V10 4X4
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