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1997-2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

SUGGESTIONS? Need New Coil Packs

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Old 01-15-2018, 11:34 AM
jacecil082 jacecil082 is offline
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SUGGESTIONS? Need New Coil Packs

Need to replace some COP's on my 06 Navigator 5.4L.

Any suggestions on brand? Would like to try and not break the bank but don't want to use a brand that is no good either.
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Old 01-15-2018, 12:15 PM
R&T Babich R&T Babich is offline
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Originally Posted by jacecil082 View Post
Need to replace some COP's on my 06 Navigator 5.4L. ...
Are you sure the COPs need to be replaced?
The boots usually degrade long before the coils go bad.
I've used Denso boots and coils that work well.
I've changed the boots 3 times and still have the OEM coils after 173k.
Some say they are the manufacturer for the OEM Ford units.
Rock Auto seems to have among the best prices for them.
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Old 01-15-2018, 03:41 PM
jacecil082 jacecil082 is offline
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Originally Posted by R&T Babich View Post
Are you sure the COPs need to be replaced?
The boots usually degrade long before the coils go bad.
I've used Denso boots and coils that work well.
I've changed the boots 3 times and still have the OEM coils after 173k.
Some say they are the manufacturer for the OEM Ford units.
Rock Auto seems to have among the best prices for them.
I suppose it could just be the boots. Anyway easy way to test the pack?
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Old 01-15-2018, 06:34 PM
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alwaysfords41 alwaysfords41 is offline
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Yes change the boot on the one that is misfiring.
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Old 01-15-2018, 06:54 PM
Augusto1963 Augusto1963 is offline
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I changed all for Accel yellow coils, improved performance and millage, I'm very happy with my choice.
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Old 01-15-2018, 09:29 PM
jacecil082 jacecil082 is offline
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Originally Posted by alwaysfords41 View Post
Yes change the boot on the one that is misfiring.
Unfortunately it's not throwing a code so I'm not sure which cylinder it is.
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Old 01-15-2018, 11:17 PM
rowekmr rowekmr is offline
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I have heard that before that the boots go bad first. How does the boot attach to the coil?
Quote:
Originally Posted by R&T Babich View Post
Are you sure the COPs need to be replaced?
The boots usually degrade long before the coils go bad.
I've used Denso boots and coils that work well.
I've changed the boots 3 times and still have the OEM coils after 173k.
Some say they are the manufacturer for the OEM Ford units.
Rock Auto seems to have among the best prices for them.
Can't believe how cheap they are:
Amazon Amazon
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Old 01-16-2018, 02:50 PM
pdqford pdqford is offline
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Originally Posted by jacecil082 View Post
Unfortunately it's not throwing a code so I'm not sure which cylinder it is.
Hmmmmm. So how will you know which COPs to change?
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Old 01-17-2018, 12:48 PM
jacecil082 jacecil082 is offline
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Hmmmmm. So how will you know which COPs to change?
Swapping and testing... LOL
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Old 01-20-2018, 10:39 AM
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meborder meborder is offline
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Bite the bullet and do them all.

I did them one at a time for the same labor cost as doing them all.

I tried to save my two newer coils and replaced 6 of the 8 instead of doing all 8. Cost me $100 labor. Later that week when the #4 was acting up I took it back and paid $45 in labor for that one coil.

Lesson learned.

I got my coils from NAPA for about $50 each on the good guy deal. They sell a cheaper coil but get the premium.

Trying to do them one at a time did not work out for me.
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Old 01-23-2018, 09:27 PM
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Resto Guy Resto Guy is offline
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For 15 years whenever I replaced a faulty coil (with boot), the related plug was replaced with a new Motorcraft plug. The last few years the coil failures became more frequent, like 2 or 3 times per year, usually after extended periods of wet weather.
About a year ago I bought 8 Denso coils and boots, and 8 Motor Craft plugs. Plugs are torqued to 22 lbs.
I can't remember the Expedition ever running so well.
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Old 01-27-2018, 10:43 PM
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Originally Posted by Resto Guy View Post
For 15 years whenever I replaced a faulty coil (with boot), the related plug was replaced with a new Motorcraft plug. The last few years the coil failures became more frequent, like 2 or 3 times per year, usually after extended periods of wet weather.
About a year ago I bought 8 Denso coils and boots, and 8 Motor Craft plugs. Plugs are torqued to 22 lbs.
I can't remember the Expedition ever running so well.
I had the same problem. Kept eating coils up. Changed the plugs and the coils. Runs like a swiss watch. it was 3 years ago. I used the A/C delco brand from Amazon. it was right around $100 for 8 of them. so far so good.
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