Review on ECCPP Portable Replacement Ignition Coils for Ford/Lincoln/Mercury 1997-2017 - Compatible with DG508 DG457 - Pack of 8 - Ideal for Travel, Transportation, and Repairs by Curtis Donjuan

So I put them on my '00 F150 4.6 in January 2018. After I swapped them out, the car ran great for a while. In September I started noticing random misfires but couldn't get a code from the truck to tell me which cylinder. Played around with all the coil packs and it ran smoothly again. It was about a month before he did it again, same situation, same result. It's December 2018 and every time the temperature drops below 30 degrees the truck stalls until it warms up (or about as long as it takes me to get home). I have a spare coil that I changed last time but it's too cold to spend all that time diagnosing which one is defective so I'll just replace them all for peace of mind. I ordered another set together which had a better overall rating despite being twice the price. Hope they last a little longer. In general, they're significantly cheaper than the originals, but you get what you pay for.