Cookie_Monster
Member
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, but it would seem something inside is smaller?
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.
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.
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, but it would seem something inside is smaller?
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.
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.
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