Lanister
09-02-2013, 11:50 AM
... but if you do, be sure to inspect it closely before installing. My zhp has hit 90k on original plugs so I sourced out a proper set of NGK's on Amazon. During installation, I managed to drop one on the floor from a few feet up. The plug hit the ground with one of the electrodes so the gap was a bit off. I adjusted it and installed the plug. When I was done, the car started up just fine but as it continued to warm up, the motor would run worse and worse. Then, the check engine light came on. It was the all-too-familiar, "you're missing a cylinder" behavior. I pulled the plug and found a hairline crack along the ceramic body of the plug. :facepalm After replacing the plug, everything went back to normal.:thumbsup So ya, these plugs are more fragile than they look.