quote:Hello Mikael; In your experience of pre-testing spark plugs prior to installation for resistance...Have you ever encountered/tested a Brand New spark plug the FAILED the resistance test?!
Mark, testing for resistance in resistor plugs have often revealed a single plug with more than double built in resistance compared to the rest. I don't know how much that means, but in an attempt to secure even cylinder performance I discard it. A plug that didn't fire at all, that I can't remember.
A set of ten also makes indexing them easier if you want to go to that length