Hey Scotty, 

I have a 2014 Toyota Sequoia that I recently purchased, with 162k miles that has a recurring intermittent misfire on cylinder 4. I’ve changed all spark plugs and ignition coils on all 8 cylinders. Cylinder 4 continues to misfire and throw code and engine light randomly. I recently moved the ignition coil from cylinder 4 to cylinder 1 and still had misfire on 4. It will run fine for a few days, then randomly misfire. Sometimes it will correct itself but recently I purchased a code reader and have been resetting the code if it doesn’t reset on its own. 
Any suggestions will be greatly appreciated. I’m regretting my purchase. Jody Duncan