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Car Forum / Ford / Ford Trucks / April 2006

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Ford Coil over Plugs

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js - 10 Apr 2006 12:45 GMT
Does anyone use these?

Im a distributor and can get sets of 8 new DG508 coils out to Ford owners
for 140.00 per set. I dont know if this would help anyone out, so I am
checking to see if there is any interest here.

Leave comments to let me know if this is a good thing, thanks.
CJB - 11 Apr 2006 17:07 GMT
That sounds like a good deal.  The only thing is, I doubt that you'd have
much demand for sets of 8.  Usually if these coils fail, it's one at a time.

CJB

> Does anyone use these?
>
[quoted text clipped - 3 lines]
>
> Leave comments to let me know if this is a good thing, thanks.
js - 12 Apr 2006 00:29 GMT
Ford replaces the whole set much of the time.

When a coil does go down, it can damage the rest of the coils.

The Taxi Companies I deal with started doing entire sets and it reduced
their down time significantly. Many shops find that replacing single coils
without testing the entire set leads to comebacks. One new coil on the
engine can pull a higher amp than the rest because of the resistance
difference, causing the new coil to go down. Failure of older coils often
occur as well, leading to additional labor charges to the customer. When you
start seeing coils go bad, the rest are not far behind usually.

If only one are bad, the resistance on the older coils are higher than the
new replacement coils also, which eventually leads to more failures. If the
older coils are tested, if there is a significant difference in the
resistance, the entire set should be replaced.

(@6.5 amps Primary Current) (@9.0 amps Primary Current)

Primary Resistance 530 m? 410 m?

Secondary Resistance 5500 m? 4000 m?

I've been selling full sets to installers for 3 years.

> That sounds like a good deal.  The only thing is, I doubt that you'd have
> much demand for sets of 8.  Usually if these coils fail, it's one at a
[quoted text clipped - 9 lines]
>>
>> Leave comments to let me know if this is a good thing, thanks.
CJB - 12 Apr 2006 14:39 GMT
> Ford replaces the whole set much of the time.
>
[quoted text clipped - 34 lines]
>>>
>>> Leave comments to let me know if this is a good thing, thanks.

That's very interesting.  Thanks for the added info.

CJB
pkurtz2 - 15 Apr 2006 00:45 GMT
>> Ford replaces the whole set much of the time.
>>
[quoted text clipped - 38 lines]
>
> CJB

These are awesome, only problem is that they were mainly used on the higher
end Ford models like Lincoln. So if your vehicle isnt original with them,
then you have to change out the whole wiring harness and ECM to make the
change. The nice thing about COP's is that the coil on-time or charge time
is greatly enhanced which reduces the chance of a misfire at higher RPM's.
If you have a 4.6L engine with regular DIS, I recommend boning the cash to
replace it with a COP system. you will definitely notice a difference in the
way your engine runs. Hence the term purrs like a kitten.
CJB - 15 Apr 2006 03:23 GMT
>>> Ford replaces the whole set much of the time.
>>>
[quoted text clipped - 49 lines]
> difference in the way your engine runs. Hence the term purrs like a
> kitten.

I have a 5.4 in my van, and it has COP.  Thankfully it only has 25k miles on
it and I have the extended warranty to 60k.  We drive around 8-10k a year,
so it'll be a while before I need them.

I do like COP tho.  I had COP on my 2000 Taurus Duratec and it worked well.

CJB
ced1224@netzero.net - 16 Apr 2006 14:36 GMT
just had 3coils changed at dealer in my 01 under warranty--ford charges
110 apiece for coil and sparkplug according to bill -   43000 miles on
truck--dealer said it is a common problem
js - 18 Apr 2006 20:41 GMT
> These are awesome, only problem is that they were mainly used on the
> higher end Ford models like Lincoln. So if your vehicle isnt original with
[quoted text clipped - 5 lines]
> difference in the way your engine runs. Hence the term purrs like a
> kitten.

The Lincolns and TC's (high end stuff) and a few Stang's use the 32 Valve
engines that take the DG481 coil which requires a straight boot.  Most of
the rest of them used the DG491 until that was superceded by the DG508
around 2004/2005 that have a 15 degree angle to the boot.

The one with the angle dominates the market, thats what I have.
 
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