I just recently had the dealer replace a coil pack on my 2001 Expedition due
to a rough idle condition. I had no idea these packs were so expensive
(parts & labor). What ever happened to standard plugs and wires? Does
anyone have the wiring diagram/engine layout so I can do these myself next
time (hopefully there won't be). Because at $250 each with a V8 thats not
Your assistance is greatly appreciated.
They are not standard any more. The new coil packs don't have to be replaced
all that often. The plugs go up to 100,000 without replacement. The truck is
more reliable, requires fewer repairs (no distributer caps, rotor, etc. to
replace), and saves money over the long-haul. Plus, it also saves fuel,
because it helps keep the engine more fuel efficent and decreases the
release of unburned hydrocarbons (good for the environment).
I'm not convinced Jeff. The old coils did not need to be
replaced "all that often", either. Todays plugs will go
100k miles in a distributor system or conventional
multi-plug coil packs but, if you are in a corrosive
atmosphere, you probably should check or change them at half
that just to make sure they can be removed. As far as
reliabilty, I have not seen that to be an issue for many
years even with distributors. As far as cost effective, I
don't see that either when you can replace an entire
ignition system for what about a set of coil packs cost with
installation. I do not see an increase in fuel efficiency
either - at least not just because of coil packs. You can
only ignite the charge at the proper time and you won't have
any more spark at the plug than it takes to bridge the gap
at that time. Hydrocarbons won't be an issue in any system
that ignites a proper fuel charge at the correct time.
I guess I just can't imagine having 8 coils where each cost
more than a single coil would cost as being cost efficient
or more reliable and durable. I've seen too many of the
Ford and Nissan COP packs fail just over 100k miles to
believe they are any more reliable. I suspect other
manufactures are about the same. I am not a big fan of
caps, rotors and wires but, I am not convinced the COP is a
big improvement unless the manufacturers can greatly improve
the long term durability of the parts themselves. There is
no excuse for not being able to make waterproof boots nor
for having coils that fail just because they got wet.
Not a flame response, Jeff. Just my $0.02 - nothing more
You can buy a full set of coil packs on Ebay for approximately $100 USD which
from what I am told is
less than the cost of one at a dealer. I agree, this system is not superior to
Coil Packs are in the $50 to $75 range. It is the labor that kills you.
Also, I suspect they threw a $65 diagnosis fee into that $250 total. You
probably could have had all eight coil packs replaced for around $500. Ford
issued a TSB on coil packs warning dealers that coils packs were being
replaced when they were not actually bad (Ford climed 50% of the coil packs
replaced under warranty were not bad). Also when you have the plugs done,
I'd suggest asking for new boots. These can fail just like spark plug wires.
Lazy mechanics replace the coil packs when these fail......
2000 Sable, Duratec. Just paid dealer $75 for a COP coil, hope the other 5
hold out. List is $95 and they aren't available at NAPA yet.
Darn thing ohm checked OK too but the swap test confirmed bad coil.
"anything you say can & will be misquoted & used against you"
Are you sure the boot wasn't bad? I am not familar with the
Duratec coils. The modular V-8s include a very long
boot/conductor which is nothing more than a spark plug wire.
These can fail just like regular spark plug wires. My 1997
Expedition had one coil pack replaced in 147,000 miles. My
2001 Mustang and my Thunderbird have never had one fail.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.