10-24-2009, 06:22 AM
You can get bad plugs right out of the box. If you drop a plug on a hard surface, it is possible to crack the carbon resistor core. Someone at my store dropped a case of Champion plugs, and about 1/4 ended up bad. Lots of pissed off customers. We had several cases from the same lot, and the rest were fine, so it wasn't likely a manufacturing issue.
The real high end plugs ship with a cap or protector over the business end just for that reason.
The real high end plugs ship with a cap or protector over the business end just for that reason.