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Tue Jan 1, 2019, 11:44 PM

4.6L Ford Triton motor

Any of you greasy bastards have any insight into why I would be randomly blowing coil packs?
On my third one in the past month.

I don't run the truck very often,only put about 1,000 miles on it this past year.

At this point I'm chalking it up to the large amount of rain we've been getting for the past month or so.
Spark plugs still look new and are gapped correctly.

It's a retired city truck and appears to have been maintained well.
Every coil that has gone bad appears to be original.





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Arrow 27 replies Author Time Post
Reply 4.6L Ford Triton motor (Original post)
Tolk Jan 1 OP
foia Jan 2 #1
Tolk Jan 2 #4
foia Jan 2 #9
Tolk Jan 6 #24
WhiskeyMakesMeHappy Jan 2 #2
WhiskeyMakesMeHappy Jan 2 #3
Tolk Jan 2 #6
wonderwarthog Jan 5 #18
Tolk Jan 6 #23
WhiskeyMakesMeHappy Jan 6 #25
Tolk Jan 6 #26
WhiskeyMakesMeHappy Jan 6 #27
Gamle-ged Jan 2 #5
Tolk Jan 2 #7
Tolk Jan 2 #8
Gamle-ged Jan 2 #10
Tolk Jan 2 #11
Gamle-ged Jan 2 #12
Tolk Jan 4 #15
nolens volens Jan 2 #13
Tolk Jan 4 #14
Gamle-ged Jan 4 #16
Tolk Jan 4 #17
wonderwarthog Jan 5 #19
Tolk Jan 5 #20
wonderwarthog Jan 5 #21
Tolk Jan 6 #22

Response to Tolk (Original post)

Wed Jan 2, 2019, 12:04 AM

1. No insight but it doesn't sound random if three have gone in a month.

Call a dealer service manager. Yeah, they'll try to get you to bring it in but they may also be able to give you some insight if it's a common problem..

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Response to foia (Reply #1)

Wed Jan 2, 2019, 12:51 AM

4. It's a 20 year old truck

Only time a dealership is your friend is if you are under warranty and it's an easy fix or if they think you are shopping.

I haven't found it to be a common issue with these motors.


Just looking for some insight, sometimes the best information comes from the most random places.
The Ford websites only tell me things I already know

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Response to Tolk (Reply #4)

Wed Jan 2, 2019, 01:40 AM

9. Yeah, I get what you're saying about service managers

but not ALL are like that. I was looking at an older used Infinti over the summer and called a local dealer service department just to ask the service manager what he thought of the year/model. I didn't expect much but he was quite helpful and spent a few minutes giving me his honest opinion on it and common issues with it even though there was nothing immediate in it for him.

You never know unless you try and it's worth wasting a phone call.

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Response to foia (Reply #9)

Sun Jan 6, 2019, 04:09 AM

24. I guess it depends on who's calling?

I worked for an AMC dealership when I was kid.
The folks running the desks were not nice people.

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Response to Tolk (Original post)

Wed Jan 2, 2019, 12:46 AM

2. My Triton V-10 has had three go out in the last 3000 miles.

I've got 120K on it and I'm chalking it up to the normal lifespan of the coils. I'm planning on just replacing the rest of them soon, after I do the breaks. (fun factoid: the Excursion has four wheel disk breaks)

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Response to WhiskeyMakesMeHappy (Reply #2)

Wed Jan 2, 2019, 12:49 AM

3. PS: You can get really good deals on coils at Amazon. Also, do NOT

buy aftermarket coils. I know it's tempting to buy Accell coils (ran them on my hotrods in the 80's) but this is a different ballgame. Use ONLY Ford Mortorcraft coils, they are hands down the best on the market.

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Response to WhiskeyMakesMeHappy (Reply #3)

Wed Jan 2, 2019, 01:12 AM

6. I'm sort of leaning on age myself

That and the constant rain.
The motor is dry but the humidity just seeps into everything.
I can get them for $22 locally Standard brand. Made in Poland
I believe they are just repackaged OEM.
Paid $35 dollars for the for the first one that went bad.
Was Napa brand and also made in Poland.
The two original Motorcrafts I took out are identical right down to the seams on the silicone.

I'm looking for an overlooked issue that I should correct before I just go and replace the rest of the coils.
Will have to pull the fuel rails and move around some vacuum lines that I would rather leave untouched.
Will be dousing it all with silicone spray when it goes together.
Thanks for the input, it's much appreciated.



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Response to WhiskeyMakesMeHappy (Reply #3)

Sat Jan 5, 2019, 06:21 PM

18. Running Accells

on a 4.6 Ford interceptor with no probs.

Been over a year now.

I agree the factory are better.

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Response to WhiskeyMakesMeHappy (Reply #3)

Sun Jan 6, 2019, 04:02 AM

23. I'm getting repackaged Motorcrafts

For $21.50 locally
Comes in a "Standard" box
Even Rock auto can't beat that price.
Few miles ride further than NAPA and the guys that work there don't need a computer.
It's an old school parts store.

I have yet to leave there empty handed and unhappy.
Sad part is I don't even know the name of the place.

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Response to Tolk (Reply #23)

Sun Jan 6, 2019, 12:57 PM

25. That's great to find an old school parts house. It's very frustrating

to walk in and ask for a FelPro square bore carburetor gasket and be asked "what year is that?"

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Response to WhiskeyMakesMeHappy (Reply #25)

Sun Jan 6, 2019, 05:03 PM

26. Try walking into Autozone

Or somplace like that and asking for lefthanded lugnuts.

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Response to Tolk (Reply #26)

Sun Jan 6, 2019, 06:53 PM

27. What year is that for?

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Response to Tolk (Original post)

Wed Jan 2, 2019, 12:55 AM

5. Having a 12-year-old Hyundai Azera, should I have known what a coil pack is?...

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Response to Gamle-ged (Reply #5)

Wed Jan 2, 2019, 01:15 AM

7. I would be more worried about brakes

I believe your ignition was made by Bosch?

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Response to Tolk (Reply #7)

Wed Jan 2, 2019, 01:38 AM

8. I've had my share of Hyundais and Kias

Bought a brand new Kia back in 2000
No money down and no credit.
It barely lasted the warranty.
Never an issue with the motor or transmission but the rest of the car started disintegrating the day I drove it off the lot.

They make them in Georgia now...still have the same issues.

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Response to Tolk (Reply #7)

Wed Jan 2, 2019, 01:54 AM

10. Had the rear rotors turned, pads all around. And Bosch, I believe. I take it to the dealer for work.

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Response to Gamle-ged (Reply #10)

Wed Jan 2, 2019, 02:32 AM

11. You are doing well with it then.

The dealer must be charging you some good money ...No?

They are decent vehicles...easy fix but high maintenance.
My biggest issue with them is the quality of the parts they are built with.

They are like a korean version of a k-car.

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Response to Tolk (Reply #11)

Wed Jan 2, 2019, 07:14 AM

12. 2006 was the first year for the Azera (sold as the Grandeur elsewhere). It had a 100k mile...

... 10-year drivetrain warranty and I also sprang for the extended, bumper-to-bumper warranty for $1200. I did recover that $1200 before the time was up. Hoping to have this as the first bot-new car I'll have kept for 20 years.. or more...

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Response to Gamle-ged (Reply #12)

Fri Jan 4, 2019, 06:48 PM

15. They can last

If maintained well and not abused.
I tend to be a little rough on vehicles myself.

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Response to Tolk (Original post)

Wed Jan 2, 2019, 03:06 PM

13. The ones we have had go bad

were largely due to the age of the coil, although I understand it can also be a bad spot on the coil boot that allows the spark to go where it's not supposed causing a misfire type event...Not seen that issue myself, but apparently it's a thing with these coil packs...

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Response to nolens volens (Reply #13)

Fri Jan 4, 2019, 06:45 PM

14. Ya, I'm chalking it up to a combination

Of age and moisture.
The plugs are recessed pretty deep in the head and it has been raining daily for at least a month so it seems.
What I think is happening is condensation is forming on the wall around the boot and causing them to arc, ultimately burning out the coil.
Just going to replace them all this weekend then douse them with silicone spray and hope for the best.

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Response to Tolk (Reply #14)

Fri Jan 4, 2019, 07:17 PM

16. So, looking at this diagram, a coil pack distributes the voltage to the plugs by electronically...

... switching which coil wire gets the ignition pulse, as opposed to having a mechanically driven distributor do the job like 'twas back in my day? By cracky?...



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Response to Gamle-ged (Reply #16)

Fri Jan 4, 2019, 08:34 PM

17. Has it's good points and bad points

I personally would prefer if it just had points like my Jeep.
At least if they go bad you can make them spark well enough to get you to where you need to go.
And it only takes a few minutes to swap out a bad coil, I always keep a spare in the tool kit

My truck has seperate coil for every cylinder.
On all but two of them it's a project to replace.
The fuel rails have to come off along with a bunch of random brackets and hoses.
Then a couple of them are still a little tricky to get at.

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Response to Tolk (Reply #17)

Sat Jan 5, 2019, 06:24 PM

19. CORRECT!


It was a PITA.

My mechanic was not happy.

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Response to wonderwarthog (Reply #19)

Sat Jan 5, 2019, 09:38 PM

20. Wasn't as bad as I thought

2 hours for the drivers side of the motor and I was being somewhat lazy about it.
Worst part was that the last person that was in there stripped the the head off the bolt for the #7 coil... it probably took them longer to do it the wrong way than it did for me to fix their screw up.
I had to take a 14 socket and give it a few precision taps with a hammer to pean it over enough to make the correct 7mm fit.

That bolt was moved to the easiest accessible coil since I didn't have one to replace it.

I would charge at MOST $200 plus parts with no markup for someone I didn't know.
The charge for a friend would be a six pack and hand me tools.

That's flat rate on an unmolested engine.
I pop the hood and see electrical or duct tape in bad places... everything changes.
A friend would owe me a bottle for that headache.
Some random person I would charge a ridiculous price to make it worth my time.

Parts ran $22 dollars per rebranded factory coil and $45 for all 8 spark plugs
Didn't need spark plugs at all but I see no sense at all in doing the same job twice.

The truck is running like a top, and it actually stopped raining!


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Response to Tolk (Reply #20)

Sat Jan 5, 2019, 10:36 PM

21. Great ending for the story!


Glad she's running right!

I think my mechanic charged me about 80 bucks or so.

He was giving me a break.

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Response to wonderwarthog (Reply #21)

Sun Jan 6, 2019, 03:41 AM

22. You have a good mechanic

He gave you the " this guy is cool" price.
You owe him a bottle or bud or something...just out of good natureness (not sure if that's a word ,but it is now)
You have a cop car so I'm guessing from above, so even tighter working space.

Take care of your mechanic, he'll take of you.

My mechanic is an asshole.








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