Any reason to replace coils?
I just did a plug change on my 2007 XLT, with the 5.4 flex engine. I bought plugs and coils online. The coils turned out to be the wrong ones, with the angle, wrong mounts and clips. Stupid me did not look at the new coils until I had everything apart and all the coils and plugs out.
Long story short, I put the new plugs in with the stock old coils. They have about 50,000 mile on them. The truck runs even better now. It wasn't missing or anything before. So any reason to not just keep the stock coils in there? Do these coils last a long time?
P.S. I got every plug out without a single breakage. Did it on a cold engine that sat for a day and the plugs soaked with PB blaster for 3 hours.