Sultans of Spark. - Hey if they work, that's all that counts. I ran this set for awhile. Motorcrafts, 6 months old, first #8 went out, replaced it with another Motorcraft. Then #4 went out, I replaced the set with Globals. That was back in 2005, still running the Global coils.

 

BTW- You have to install coils right or you will fry them. They also need good contact. Either solid Granitelli or Weapon X connectors are best (No springs). Just keep the contact points clean before install. You grease the entire inside of the boots first/ slide the boots over the springs/ grab the spring tips , clean with a grease cutting agent (I use lacquer thinner, it's fast and easy). Let go of the springs so they recoil back into the boot, your done. They will miss and short if you get grease at the contacts.

 

Just found this pic. This is when my second coil went bad from a 6 month old set of new Motorcraft coils. I switched #1 with #4 to confirm it was the coil @ fault.

 

So after a port & polish -



I installed these -



The V10 Pack of GAMMA's from Global -



Of course, I just needed 8, -still have two spares.. - Well 12 all together...

Great coils, not a single problem. This is my second set of Global's. My first set is in the file cabinet. Still good, just wanted to freshen them up with a new set. Didn't need to, oh well lol.

 

Look at it this way.
The mfgering process may be different and or quality control may be lacking in other sources.
What happens with a failure is the fine wire may break away from the terminal on either the primary or secondary winding, the winding may develope shorted turns.
A winding gone open will be a hard fault and set a code so there is no question as to the fault.
If a coil develpes a shorted turns condition, it's voltage output will be lower and cause a missfire under certain conditions. This faulure mode most often does not set a code because the issue comes and goes with driving conditions and may even be temperature sensitive.
I think the bottom line is Ford has a spec for it's vendor mfger for using their coils in new vehichles and as replacement for dealer service under warrenty.
Any other coil source is questionable when compaired to this postion.
How can you know quality from another source?
The ACCELS are made in China. Since I had tried them, they brought nothing but grief but was a rolling test to find out. This is why I can write this positon.
Make no mistake, any coil can fail at anytime but your best long term relibility should be with the Motorcraft part.
After all, coils are an expendable part the same as tires and brakes.
Few ever complain about having to replace tires and brakes as most of the time these parts have a shorter life span that known good quality coils.
Here is a time not to consider trying to go cheap to save because it may just cost more in the long term for hassle, time and cost.
.
The fault conditions as discribed above have to do with the production control for winding Enamel coated wire on a bobbin core then potting the whole assembly. If the winding is too tight, wire brakage can result from repeated expansion and contraction that is heat related.
The other item is the Enamel coating on the wire can rub through being against each other in the winding layers. This is where the shorted turns come from.
The bobbin is a magnetic material core that plays a major role in transforming 12 volts to 40,000 + volts.
If there are shorted turns, it has a shunting effect on the total output voltage lowering it and still not be an outright failure.
Under certain conditions, this will cause a cylinder missfire. This is why it is hard to detect which cylinder is the cause unless certain measures are taken to find the faulty coil.
As well, coil design quality will be taken just so far due to cost and average life for warrenty and relibility or you would not be able to afford replacements and still have to replace more often costing the same or more in the long run.
Nearly every motor that uses modern COP style coils has the same general issues to a greater or lesser degree.
Your decision after being presented with some fact about the general situation.
Good luck.

 

I just had a buddy of mine replace all the coils today with a set of Globals and I had one bad one. I had replaced one of the coils about a year ago when a stocker went bad and didn't have time to wait for a replacement. The one cost me $60. The 7 good ones from Global set me back $85. It is worth the hassle of an occasional bad one to save $400.

I couldn't find the ten pack on eBay the day I ordered mine or I would have done that and been done with it. Oh well 7 new and 1 almost new coil...did spring the $5 for a new boot and spring!

 

Well...........I finally bit the bullet and bought the set of 8 from Global via eBay.
$79.99 plus free shipping. I had my mechanic install and one of them out of the ox was dead. He took one of the known goods I replaced and used it. I kept the other known goods incase one fails in the future. NOT BAD for 80 bucks.I am VERY HAPPY. No known issues and it was this thread that helped me decide to go ahead and pay to have them. I have ALWAYS gone to ford for everything and I did have two or three replaced last year by Ford, but the cost was sooo high individually and for install, I thought what could I lose for trying Global. Thanks again everyone in this website.

 

Just had 2 Globals go out on my after 15k miles. Replaced all 8 with Accel's from Amazon. So far, so good. Much better throttle response than with the Globals.

 

Accels are junk, I don't know of anyone that has had them last lol. I used Globals since 2005 without a problem.

Yea, you'll have better throttle response running on 8 cylinders. That's a given. Global coils aren't perfect, none of them are for that matter. But Accels have the worst record by far.

 

Never had great throttle response since the Globals were installed. If the Accel's start to go out, I will get something else. I will not be going back to Globals.

 

Hate to burst your bubble, but coils have nothing to do with throttle response, if they're firing. Good luck all the same.

 

As Jim says, coils don't make power.
Only way you would see any difference is if the coils were very low in output.
If that were the case you will see a missing condition in OD or third at low throttle and light loads when the EGR is opened and reserve spark voltage is needed to fire a very lean mixture.
So coils, unless there are really low in output, won't add any performance over a stock coil or any other make of coil.
It's an extended subject about coil voltage and and how it works but let it at this for now.
Coils live a harsh life located on top of the motor, exposed to radiator heat, head heat and exhaust manifold heat.
The expansion and contraction is what takes them out.
It breaks internal wire connections and causes shorted turns over time.
None are immuned to the effects.
Good luck.