I cant understand this! I have had a problem the last few days with my car. I finnaly narrow it down to the pickup coil in my msd dist. So I replace that one. The a day later I hear popping in my exhaust ad idle. Well I narrow that down to number 6 cyl not firing. I figuire out that the plug is bad. So I put in another plug. Wola fixed right! wrong. I make three passes. Car runs the within 2 thenths of my previous numbers and then number 6 cyl is not firing again.! wtf is going on??

Drew