[Rich Biebel]

I had an MSD 7al 2 in my Firebird Stocker. One day at the track I started to get misfiring over about 6000rpm and the tach was jumping around when it misfired. This engine had a crank trigger and most everything but the MSD box was new. I borrowed my friends identical 7al2 and the car ran perfect...no missing. I sent my box to MSD.....they said they could find nothing wrong with my box. I swapped it back into my car one day at the track....same problem returned...missed badly over 6000 and tach was shutting off when it missed....removed it and reinstalled my friends box same day....no missing. I bought a Digital 6 and matching coil and installed that. That box failed for the person who bought that car and it was no more than 2 years old when it failed. Probably got wet sitting out in the rain from waht I was told....I used to think MSD was the best ignition and boxes either worked or they didn't. I bought an MSD ignition box tester that they sell.......it allows you to fire the box without the engine running......pretty handy for testing a lot of things that are rpm triggered and to see the spark energy at any rpm. If I have a box I am not sure about...I'd replace it and MSD is not the only brand out there...Mallory has a good reputation for reliability.....


If you have an MSD distributer with mag pickup in the distributer your problem could be the small module in the distributer........I have a friend who chased a miss for months and that is what his problem truned out to be.....