
I installed them in March 2018, they worked fine initially. My fuel consumption increased slightly and the engine ran well. In mid-November the first began to fail, as it got colder it was replaced with a new package from a local dealership. It is now December and another one started to fail and I had to replace it. Others don't fire randomly. My only guess is that these coil packs don't take cold weather. I get a few misfires when starting my Jeep and it's cold, below 20F it's noticeable. Once the motor and coils are warm, the errors go away. I have measured the coils with a multimeter and when they are very cold they are out of spec, when warm they are within spec. Spend a little more money for better quality reels.

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