Cracked ceramic plug issues
Started up the Valiant this weekend for the first time this year. Looking for issues I found another spark plug wire shorting out the end of the boot to the hex on the plug. Pulled the plug and the ceramic is cracked. This is the 3rd AR3910 plug that has done this. Seems odd. WTF. Have and MSD7 and a pro power coil 13.8 to 1 race gas . Why does this happen? What are these flakes/dark spots on the ceramic?
Started up the Valiant this weekend for the first time this year. Looking for issues I found another spark plug wire shorting out the end of the boot to the hex on the plug. Pulled the plug and the ceramic is cracked. This is the 3rd AR3910 plug that has done this. Seems odd. WTF. Have and MSD7 and a pro power coil 13.8 to 1 race gas . Why does this happen? What are these flakes/dark spots on the ceramic?
