My Camry has been acting a little rough lately. I would feel a little "bump" at highway speeds when the rpms slowed down from 2000 rpm and the tranny upshifted and the rpms dropped to 1500. I mistakenly thought it was tranny related. Coming home last night it was having more issues so I thought it would be bad enough to store a pending code and it did and then the CEL light up on the dash. P0301 which is a misfire on cylinder 1. I flipped the coils from cylinder 1 to cylinder 2 and still had a P0301. This surprised me. I switched the spark plugs from cylinder 1 to cylinder 2 and put the coils back to the original orientation and got a P0302 misfire on cylinder 2. Hmm, bad plug which was surprising since I replaced the plugs 25k miles ago. On examination, the plug was not discolored but had a large gap. After I bought new plugs, I realize the old plugs do not looks good at all. I bought the old plugs from Amazon. I'm thinking they were counterfeits or defective Densos. What else could cause this? The car runs fine and I don't notice any change in gas mileage. The plug at top is the one that is causing misfires and throwing codes but the other ones don't look much better. A new plug at the bottom for comparison.