Review on NGK G-Power Platinum Spark Plugs TR5GP - 6 PCS NEW (Part # 3186) by Mike Rice

Failed to load media. One of the spark plugs failed after a few months. I couldn't figure out what was wrong with my truck, I felt like it was running on five cylinders. I looked at all the spark plug caps and found that this one is grounded outside of the spark plug. I bought new cables thinking they were cables, but I did the same thing anyway. I then unplugged it and from the outside it looks fine, so something inside must be broken. After that I changed all the spark plugs and the car drives normally.