GEN 1 Gen 1 Coils - eBay (Part 2)

[Cookie_Monster]

i was able to solve the loose pellet issue by adding a spacer. A piece of shrink wrap only shrunk on the spring end, the pellet is still free floating for a good conection.



The coils themselves are hard to tell apart. The OEM has circular injection mold tool marks on it, the eBay does not (top eBay, bottom OEM)-



The OEM weighs more too. OEM (without boot, spring, pellet) weighs 311g, the eBay weighs 261g. Not sure why, perhaps something inside is smaller?



Labels look different, OEM has grey printing and contains a paint mark, eBay is brighter. Info is the same and they both are marked FoMoCo. (OEM on left, eBay on right). Also while on this view, the connection for the lower plug wire on the eBay only has one detent 'click' when you press the wire in. The OEM has 3 or 4 clicks. When you push the wire on, it goes click click click as you press the connection on fully. eBay only has 1 click.




One other note of interest, the resistor pellets appear to be 1k Ohms -



So in the end I think it was a worthwhile experiment. For $160 I confirmed the coils were indeed not working correctly. Truck went from getting 11-12 mpg to now getting 13-14 mpg. I was able to nurse it up to nearly 17 mpg after filling up and taking it easy for a little while. Yeah these are conterfeit coils, but they work. If they last a year great, and then I'll go spend the coin on a real set.

 

[Cookie_Monster]

Here's a side by side look. Very difficult to tell them apart. (OEM on the right)

*Note the angled part at the bottom of the OEM is because it had corroded and a bit of the plastic broke off. It should be square like the eBay.

 

[TomDirt]

"Labels look different, OEM has grey printing on black and contains a paint mark, eBay is brighter. Info is the same and they both are marked FoMoCo. (OEM on left, eBay on right). Also while on this view, the connection for the lower plug wire only has one detent 'click' when you press the wire in. The OEM has 3 or 4. When you push the wire on, it goes click click click as you press the connection on fully. eBay only has 1 click."

I replaced the set on my 2012 3.5 ecoboost back in January with a set from ebay. So far, so good.

 

[Marlboroman]

Amazon ones worked about a year. Which is cheaper than 1 single oem. Last oem coil I bought back in February lasted about 8 months. Always with the defective one