Cracking Sparkplug porcelain
As of about a month ago, i have cracked my 2nd sparkplug while driving. The first time i cracked a plug was about 3 months prior to this one. Both plugs that cracked were NGK's. I know that the plug is cracking while driving because when it does form a crack, the engine will start misfiring inconsistently. As in, sometimes it will actually fire the plug and sometimes it will arc through the porcelain into the spark plug tube. I am running a MSD 6al ignition box, Blaster SS coil, ULTRA 8mm plug wires and an oem distributor. I don't remember if the previous plug that cracked was the same cylinder. I did switch to a different brand plug for the time being and will post back if it does end up cracking again.
On a side note, i was reading a TSB that BMW came out with regarding the same issue , and their fix for the problem was to replace the ignition coil boots and spark plugs.
On a side note, i was reading a TSB that BMW came out with regarding the same issue , and their fix for the problem was to replace the ignition coil boots and spark plugs.