Ignition Coil?
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Joined: Jul 2010
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From: Media PA
Thanks Tom.
Stewart also says replace the boots to start with. I will take the advice given here by all and start with that, along with changing plugs. That is the least expensive route.
I have read the procedure on changing plugs. Should have no problem. When wrenching on anything, my motorcycles and guns included, I do it all by feel and never get western on anything with a tool. I know how to use some finesse.
Stewart also says replace the boots to start with. I will take the advice given here by all and start with that, along with changing plugs. That is the least expensive route.
I have read the procedure on changing plugs. Should have no problem. When wrenching on anything, my motorcycles and guns included, I do it all by feel and never get western on anything with a tool. I know how to use some finesse.
Do yourself a favor here and use a torque wrench when installing the new plugs, your ;00 heads only have 4 threads and its pretty important to not have them too loose or too tight.
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Cross-Country
Joined: Mar 2016
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From: Riverton Wyoming
Sounds good. You mentioned torque specs in a previous post. Is it 11 ft/lbs. or 26/28 ft/lbs? I was confused with the numbers in your comments.
"'00/'03 spec calls for 11 ft/lbs and '03/'05 is 17 ft/lbs, I have an '05 and used 32 ft/lbs. Many owners of the earlier build trucks (like yours) with the fewer threads have had good luck with 26/28 ft/lbs."
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Joined: Jul 2010
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From: Media PA
Sounds good. You mentioned torque specs in a previous post. Is it 11 ft/lbs. or 26/28 ft/lbs? I was confused with the numbers in your comments.
"'00/'03 spec calls for 11 ft/lbs and '03/'05 is 17 ft/lbs, I have an '05 and used 32 ft/lbs. Many owners of the earlier build trucks (like yours) with the fewer threads have had good luck with 26/28 ft/lbs."
"'00/'03 spec calls for 11 ft/lbs and '03/'05 is 17 ft/lbs, I have an '05 and used 32 ft/lbs. Many owners of the earlier build trucks (like yours) with the fewer threads have had good luck with 26/28 ft/lbs."
The semi-common issue of plug blowouts on early 4 thread head modular motors is blamed in part by some on the very low 11 ft/lb factory torque spec, it really is just about hand tight. Many owners of these motors have had very good luck with over torqueing the plugs up to the 26/28 ft/lb range which seems to keep them well seated for the long run. Many also recommend a recheck of the torque after 5 or 10K miles to ensure they are holding tight. In mid-year '03 Ford increased the number of spark plug threads on these motors to about 7 and the increased the torque spec to 17 ft/lbs. This seems to have greatly reduced the plug blowout issues. Even that higher spec still seems low to me (and many others) so I went with the 32 ft/lbs setting when I changed my '05's plugs.
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Cross-Country
Joined: Mar 2016
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Likes: 4
From: Riverton Wyoming
The semi-common issue of plug blowouts on early 4 thread head modular motors is blamed in part by some on the very low 11 ft/lb factory torque spec, it really is just about hand tight. Many owners of these motors have had very good luck with over torqueing the plugs up to the 26/28 ft/lb range which seems to keep them well seated for the long run. Many also recommend a recheck of the torque after 5 or 10K miles to ensure they are holding tight. In mid-year '03 Ford increased the number of spark plug threads on these motors to about 7 and the increased the torque spec to 17 ft/lbs. This seems to have greatly reduced the plug blowout issues. Even that higher spec still seems low to me (and many others) so I went with the 32 ft/lbs setting when I changed my '05's plugs.
I didn't realize it was due to the low torque of the plug.
Makes sense with only four threads. Wouldn't take much to loosen up.
Thanks again for the info.
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Cross-Country
Joined: Mar 2016
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From: Riverton Wyoming
Tom, thanks for the suggestion on Rock Auto.
Denso COP boot kit shipped to me for $36. Local parts store wanted $80
I usually spend my money locally, but in this case it saved me quite a bit buying the boots on-line.
Denso COP boot kit shipped to me for $36. Local parts store wanted $80
I usually spend my money locally, but in this case it saved me quite a bit buying the boots on-line.
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Joined: Nov 2010
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From: N. IL
Oscilloscope diagnosing on the other hand is mesmerizing 
.
Heck, do the plugs while you’re in there that deep.
.
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Cross-Country
Joined: Mar 2016
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From: Riverton Wyoming
Oscilloscope diagnosing on the other hand is mesmerizing .
https://youtu.be/gmjS5qXp3sU
Heck, do the plugs while you’re in there that deep.
.https://youtu.be/gmjS5qXp3sU
Heck, do the plugs while you’re in there that deep.
I got plugs too. Not looking forward to doing the back of the right bank.
I remember doing engine diagnostics on an old SUN machine when I was in high school auto mechanics class back in 78'-79'. That old machine I believe was from the 60's. LOL
FTE Chapter Leader
Joined: Nov 2010
Posts: 30,591
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From: N. IL
Yeah, number 5 is a pain, get a wobble extension and take your time.
I think taking off the triangle shaped piece (3 bolts) makes it easier.
I think taking off the triangle shaped piece (3 bolts) makes it easier.
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Cross-Country
Joined: Mar 2016
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From: Riverton Wyoming
Yeah, going to have to remove some stuff out of the way. My problem is having a bad back and leaning over close enough to reach it.
I may have to crawl up in there to get to it. I barely got to the coil connector plug when I removed it troubleshooting.
Rock Auto shipped my plug boots today. Should see them Friday. Will have to work in the cold weather doing this. My garage is not big enough for the Excursion to fit in. :/
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Cross-Country
Joined: Mar 2016
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From: Riverton Wyoming
Been a while since I have posted. Wanted to thank everyone for the help. I did get all plugs and boots replaced.
The trouble wound up being a simple coil replacement on number 6 cylinder. Been running great ever since.
The trouble wound up being a simple coil replacement on number 6 cylinder. Been running great ever since.
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From: Central Coast of CA
Stewart
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From: Media PA
Thanks for the follow up, great to hear that another mighty V-10 is running perfectly!
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Cross-Country
Joined: Mar 2016
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From: Riverton Wyoming
The info that was provided was very valuable. Without soaking the plugs prior to removal, and not torquing them to the correct specs, the outcome may have been entirely different.
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